Thanks of the info guys, but in my head it only nerfs you to play as 4 monks, why?
-Because in a 4-player game monster health is increased by 250% hp
-There can only be 1x EP on a single monster, and therefor the 3x other EP's applied is wasted, even with the Impending Doom rune since it triggers on monster death and explodes around the mob itself with a 1 x 6350% dmg as wpn dmg.

What does that mean? While the monsters health is increased by 2.5 times the damage is still the same. And by that your damage as a 4x monk team applying EP is only doing 1/4th of the damage it would in a solo-game. Ofc I am not saying monks are bad, I am just saying that playing as 4 EP monks sounds like a waste since it is the main source of dmg.