You are very wrong, this bonus is AMAZING - Rend is always up 100% of the time on your current target and sometimes on secondary targets as well. That means it will tick at least 20 times/minute. Deep wounds ticks once per second for 6 seconds and has very close to 100% uptime, that's 60 ticks/minute - but let's be conservative here and say 40/min.Originally Posted by Grimraven
(20+40)/60 secs = 1 tick/sec. 2% chance to proc on each tick means this will have ~1.2PPM for 10 sec duration means this buff will be up 20% of the time (assuming no ICD). This setbonus is roughly on par with the mirror of truth proc.