Originally Posted by
Golde
EP is +15% to all damage, so it matters most for the moments you normally do increased damage, be it Vendetta, H/BL, empowered rupture...hell, even during set/trinket/passives procs if ya wanna squeeze it all out (some of those cases may stand to reason tho) by slapping a +15% on top of it.
And because there are a lot of those more damage moments we get to the theoretical 75% uptime on EP (I'm not saying it, just stating what others here said).
Personally I only track the most important ones and mantain EP fully, when not I just go with 4+ Envenoms and 6p Ruptures (Having almost 55% crit with full EoC stacks and +8% Mutilate crit from traits helps a lot).
My 2 cents.