Here is the thread about mysterious deadly skill, hated by many loyal citiziens.
1) What weapon suitable for backstabs?
Currently, any piercing/stabing short blade, and piercing/stabing javelins.
List you can see at wikia: short blades, javelins
2) Does any char stats affect on backstab success?
No. Only backstaber skills affects on backstab success.
3) Does backstaber level affect on backstab success?
Yes, the lower your level (below 30) the lower your backstab success, at 30 lvl it is maxed and after 30 lvl there is no difference between 30 and 51 lvl in backstab success terms.
4) Does victim level affect on backstab success?
Yes, the higher the level of victim the lower backstab success (tests not finished yet, maybe it is capped to 30 lvl, and after it it does not change)
5) What skills are required to land a backstab?
Well, there are 2 addends ... one happens if hide successfull, one happens if sneak successfull
First addend: backstab_skill/99 * weapon_skill/99 * hide_skill/99 - works only if hide successfull(you must hide before backstab). Major addend
Second addend: sneak_skill/99 - works only if sneak successfull(you must have sneak on), and at least have 1 prac in backstab skill, Minor addend
Final chance formula: ( backstab_skill/99 * weapon_skill/99 * hide_skill/99 * 0,96 + sneak_skill/99 * 0,04 ) * victim_level_modifier(unknown still)*victim_notice(maybe)
So, nohide backstabs are available and its chance for leatherleaf is 3%, for ancient tree is 2%
And if you drop sneak completly (no pracs in it) you loose nearly nothing in terms of backstab success, but sneaks is so need to not alert poor victims.
6) Does notice of victim lowers backstab success?
Can't tell yet for sure, but i think yes, it substracts like 10% from backstab success (not tested, just from my experience, not reliable)
7) Does weapon affect on backstab success?
No, all weapons has no affect on backstab land success. All weapons are same in terms of backstab success.
8) Does victim defense affect on backstab success?
No (just from my past experience being a staber)
9) Does backstaber mood affect on backstab success?
No, mood does not affect on backstab success.
Maybe berserk backstab has malus, but i dont think so. (I can't tell for sure, results are too few to say)
10) Does terrain affect on backstab success?
I think No.
Tested for forest and plain. It has same backstab success rate.
11) Well, what about backstab damage?
Backstab negates victim ABS.
Damage of backstab depends on(addends):
Weapon melee damage: weapon with XdY melee damage has Xd(15*Y) backstab damage with values less than 50 set to 59
Ward bonus (honing): 2d60
Master damage bonus: 4d45
Strength: DOES NOT give any bonus to backstab damage.
Mood: Berserk adds damage (need more tests)
Backstaber level: if your level is lower then 30, backstab damage with chance lvl/30 will be multipied by lvl/30, in other chance you will do normal backstab damage (i think so)
And after all base damage and bonuses are summarized, it is all multiplied by backstab_skill/99
SO, IN ANY CASES, TRUE ROGUE MUST HAVE BACKSTAB SKILL AT 99% and be berserk

12) Does successful backstab scratch weapon?
No.
13) What malus of scratched weapon?
No malus, even if weapon is scratched there is no malus to backstab damage.
Conclusions:
What to prac first and what to prac higher?
1) BACKSTAB, it affects on damage and rate (for true assassins it must be 99)
2) HIDE, hide/backstab/weapon has same affect on land rate. But the higher the hide skill the less chance you get hit by victims noticed 'kill damn_rogue' command
(for true assassins it must be 99)
3) WEAPON, it affects on chance at same rate as backstab and hide (see formula)
4) SNEAK, it has negligible affect on chance, but it is needed to not alert victim when you enter into its room
Minor conclusions
I started to think and I have strong feelings that charge and weaves skills does same to its damage ...
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LOGIC EXPLANATION WHY, BEFORE I KNEW WHAT i WROTE
Before it we know that 14 str has no streng bonus, so firstly i use 14 str char.
1) First, we all know that for backstab success you need 4 skills: hide,sneak,weapon,backstab.
Lets see what lands % are with 3 skills at 99% and 1 skills at like ~75%, 4 variats:
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| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s12,d19,m1,w77,b99,h99,s99) |59 |46.84| 44 | 120 | 76.09 | 15.292 |444,504,156,454|70.86% | leatherleaf | 15.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s12,d19,m1,w99,b99,h77,s99) |59 |47.37| 47 | 120 | 75.79 | 15.719 |451,501,197,496|69.85% | leatherleaf | 30.03.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s19,d15,m1,w99,b99,h99,s78) |59 |47.69| 40 | 120 | 76.77 | 15.571 |506,555,172,146|89.41% | leatherleaf | 15.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s19,d15,m1,w99,b81,h99,s99) |48 |45.88| 32 | 97 | 62.25 | 13.120 |423,499,176,360|75.31% | leatherleaf | 30.03.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
2) Next lets see if backstab depends from dexterity and strength either has or not bonus.
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| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s19,d15,m1,w99,b99,h99,s99) |59 |45.37| 40 | 118 | 75.80 | 15.434 |416,501,147,115|90.25% | leatherleaf | 10.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
3) How to reveal formula. Turn off sneak, do not hide, zero pracs on skills.
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| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s14,d19,m1,w99,b99,h99off,s99off) |n/a| n/a | 0 | 0 | 0.00 | 0.000 |0,0,,200 |0.00% | leatherleaf | 15.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s16,d17,m1,w0,b0,h0,s99) |n/a| n/a | 0 | 0 | 0.00 | 0.000 |0,0,,320 |0.00% | leatherleaf | 15.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
Next, I put some pracs into backstab.
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| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s16,d17,m1,w0,b50,h0,s99) |30 |46.07| 27 | 60 | 39.44 | 8.359 |41,48,2,3002 |2.94% | leatherleaf | 30.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| harpoon(s16,d17,m1,w0,b50,h0,s99) |30 |47.96| 20 | 55 | 38.18 | 8.116 |47,51,1,3008 |3.19% | leatherleaf | 20.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
Code: Select all
----------------------------------------------------------------------------------------------------------------------------------------------------
| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| harpoon(s16,d17,m1,w92,b81,h91off,s99) |48 |46.85| 34 | 97 | 62.41 | 14.454 |52,59,1,3005 |3.59% | leatherleaf | 21.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s14,d19,m1,w99,b99,h99off,s99) |59 |54.10| 49 | 102 | 74.50 | 14.128 |33,28,,1941 |3.05% | leatherleaf | 30.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s12,d19,m1,w77,b99,h99off,s99) |59 |54.74| 53 | 117 | 78.84 | 14.625 |52,43,3,3001 |3.16% | leatherleaf | 25.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s14,d19,m1,w99,b99,h99,s99off) |59 |50.20| 44 | 118 | 76.02 | 15.102 |502,498,145,191|85.70% | leatherleaf | 25.04.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
And after all results we can conclusion: major andends is hide_skill/99*weapon_skill/99*backstab_skill/99 and at all 99 it is 87% on leatherleaf
4) mood does not have affects on backstab land
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| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s14,d19,m1,w99,b99,h99,s99,brave) |59 |46.41| 39 | 120 | 76.14 | 16.650 |433,500,143,120|89.97% | leatherleaf | 15.05.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
Code: Select all
----------------------------------------------------------------------------------------------------------------------------------------------------
| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s17,d19,m1,w99,b99,h99,s99,L50) |59 |51.54| 40 | 120 | 75.42 | 15.406 |351,330,164,94 |89.99% | leatherleaf | 20.05.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
Code: Select all
----------------------------------------------------------------------------------------------------------------------------------------------------
| STAB DAMAGE SUMMARY STATISTICS |
+--------------------------------------------------------------------------------------------------------------------------------------------------+
| WEAPON |SpD|R.Sp%|Dmin |Dmax | Davg |Std.dev.|N(sp,n,h,miss) |L.Rate%| Mob | Date |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+
| dagger(s15,d19,m1,w99,b99,h99,s99,L15) |29 |5.32 | 29 | 116 | 63.98 | 19.367 |25,445,68,330 |61.98% | leatherleaf | 29.05.2017 |
+---------------------------------------------------+---+-----+-----+-----+--------+--------+---------------+-------+-----------------+------------+