Originally Posted by
coolpenguin410
I'm sorry, but I still don't understand this. Why would you calculate it this way?
Assuming the to-hit rolls are successful:
1 hit: (first main hand) 100%
2 hits: (first offhand) 80%
3 hits: (doublestrike main hand) (3% * 80%) 2.4%
4 hits: (offhand proc'ed off double strike) (80% * 2.4%) 1.92%
So, to elaborate, there is a 100% chance of hitting with you main hand, an 80% chance of hitting with your main hand and offhand, a 2.4% chance to hit with your main hand, offhand and doublestriking with your main hand, and a 1.92% chance to hit with your main hand, offhand, doublestriking with your main hand and procing an offhand with your double strike.
I don't have the dev post to back it up, but my understanding was that every main hand attack had a chance to proc an offhand attack.