User:Praise/Double Strikes

Double strikes influence your damage in two ways simultaneously:

• The extra, second strike adds a damage packet
• The strike preceding 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 single dagger strike lasts 1.330 seconds on average.
A single strike preceding a double strike is faster than that even without IAS: 1.163 seconds on average.
A double strike preceding a single strike is as fast as a regular strike: 1.330 seconds on average.
A double strike preceding a double strike is faster than that even without IAS: 1.163 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 on the hit, and ends exactly before the next hit. This is not a true representation of the attack animation, but makes it a lot easier to analyse the data.

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	1.000	1330	1.000
0	0.03	1324.99	1.004	1286	1.034
1	0.05	1321.65	1.006	1259	1.057
2	0.07	1318.31	1.009	1232	1.079
3	0.09	1314.97	1.011	1206	1.102
4	0.11	1311.63	1.014	1182	1.126
5	0.13	1308.29	1.017	1158	1.149
6	0.15	1304.95	1.019	1135	1.172
7	0.17	1301.61	1.022	1112	1.196
8	0.19	1298.27	1.024	1091	1.219
9	0.21	1294.93	1.027	1070	1.243
10	0.23	1291.59	1.030	1050	1.267
11	0.25	1288.25	1.032	1031	1.291
12	0.27	1284.91	1.035	1012	1.315
13	0.29	1281.57	1.038	993	1.339
14	0.31	1278.23	1.041	976	1.363
15	0.33	1274.89	1.043	959	1.387
16	0.35	1271.55	1.046	942	1.412
17	0.37	1268.21	1.049	926	1.437
18	0.39	1264.87	1.051	910	1.462
19	0.41	1261.53	1.054	895	1.487
20	0.43	1258.19	1.057	880	1.512