Fiends as they are are ridiculous. They attack so quickly that if you shield when their attack indicator flashes, your shield isn't up by the time the attack hits. They hit for a ton of damage (as much as plenty of melee mobs) and inflict debilitating status effects. On top of that, they're really hard to hit. Everyone I know consciously avoids fiend levels.
If they are going to continue to be quick ranged attackers, they should do much less damage in their normal form and probably not deal status effects unless super-charged. Right now, they're the downer of every run.
do u mean devilites?
there have been enough topics about them. we dont know if OOO will nerf them or not but for the time being learn how to deal with them