User:Praise/Double Strikes

Double strikes influence your damage in three ways simultaneously:

• The extra, second strike adds a damage packet
• The double strike itself is faster than a regular strike
• The strike following a double strike is faster than a regular strike

Double strike probability

Daggers have an inherent 3% probability to double strike (not 2%, as this wiki incorrectly states).
Each rank of Dagger Mastery gives an additional 2% probability to double strike. This stacks additively, not multiplicatively.
Locust's Fury gives an additional 50% probability to double strike. This stacks additively, not multiplicatively.
This means that the maximum attainable double strike probability is 3 + 2x20 + 50 = 93%.

Double strike influence on DPS

A regular single dagger strike lasts 1.330 seconds on average.
A double strike is faster than that even without IAS: 1.163 seconds on average.
A single strike following a double strike is faster than a regular even without IAS: 1.266 seconds on average.

Note that the frame of reference for strikes influences your terminology, but not the implications. I use a frame of reference that starts a strike's time directly after the previous hit, and ends exactly on hit. This is not a true representation of the attack animation, but makes it a lot easier to analyse the data.

For example, this is the timeline for a sequence of strikes in my frame:
regular-1 > double > regular-2 > regular-3 strikes:
|
| 1.330 s
|
regular-1
|
| 1.163 s
|
double
|
| 1.266 s
|
regular-2
|
| 1.330 s
|
regular-3

All in all, this means that the average attack speed of daggers is not 1.330 seconds, but faster, depending on your double strike probability. It is not enough to simply add one strike per 1.330 seconds per double strike, for your DPS calculations. The table below gives the average attack speed per rank of Dagger Mastery.

Dagger Mastery	Double strike probability	Milliseconds per attack (no doubles)	Attack speed multiplier (no doubles)	Milliseconds per attack (with doubles)	Attack speed multiplier (with doubles)
0	0	1330	1	1330	1
0	0.03	1323	1.005	1285	1.035
1	0.05	1319	1.009	1256	1.059
2	0.07	1314	1.012	1228	1.083
3	0.09	1310	1.015	1202	1.107
4	0.11	1305	1.019	1176	1.131
5	0.13	1301	1.022	1151	1.155
6	0.15	1297	1.026	1128	1.179
7	0.17	1293	1.029	1105	1.204
8	0.19	1288	1.032	1083	1.228
9	0.21	1284	1.036	1061	1.253
10	0.23	1280	1.039	1041	1.278
11	0.25	1276	1.042	1021	1.303
12	0.27	1272	1.045	1002	1.328
13	0.29	1268	1.049	983	1.353
14	0.31	1265	1.052	965	1.378
15	0.33	1261	1.055	948	1.403
16	0.35	1257	1.058	931	1.428
17	0.37	1253	1.061	915	1.454
18	0.39	1250	1.064	899	1.479
19	0.41	1246	1.067	884	1.505
20	0.43	1243	1.070	869	1.531