Seriously. My entire party, all with full armor that everyone else seems to use and succeed with, all properly guarding gets decimated EVERY TIME.
These guys are way too overpowered when in groups. And considering the fact that they always spawn in groups with other annoying mobs such as kats (Which ARE balanced. but doesn't help against devilites) it just screws you over completely.

The attack power is fine. The speed is not. Guarding does hardly anything in a room full of at least 4 devilites due to the fact that each time you block one hit, another one is already on it's way towards you. Kamikaze strategy's get you killed even faster. Sure some people might say "Lol you just don't know how to block" or "Ur doin it rong nub." but the true fact is, Devilites decimate everything in T3.

Here's a situation:

You and your only other friend are in a small party button room. There are 3 devilites. 3 kats, and 2 silkwings. While trying to take out the silkwings, you are being bombarded by projectiles from both the kats and devilites, so you try and take out the devilites before the silkinwings. But in order to do that, you have to weave around and guard the projectiles that are coming at you, which shatter your shield in seconds because there's no real pause in between the rate of which your being swarmed. So you try to take out the kats, but you can't do that either because they're dashing around the room spraying spreadshots at you, while you're being beat down by the devilites. So you try and get on the defensive, but your shield breaks because you have more projectiles coming at you. Try to get a bomber in there? Too bad! Those projectiles knock off your charge, so you've got to guard or charge again while trying to swerve around the endless onslaught of projectiles! Unless you have the reflexes of some sort of super being, there's no way you can dodge every projectile coming at you without getting hurt ONCE. Gunners are put in the same situation, but have it slightly easier since they can move around more, however the speed still guts most chances of blocking or dodging a hit. Oh and lets not forget, this is the first wave of the first party button. So it just gets WORSE as you go along.

Now, ovetimers are slightly different. They are much slower then the smaller counterparts. But they dance around like crazy, so while you're chasing down Overtimers, unpromoted devilites are pelting you with more junk! it's a never ending cycle which ends in you dieing and having to revive 50 times before you can beat the room!

I suggest just nerfing the speed. Not even by half, just something like maybe 25%. You don't even have to lower the damage. Maybe just nerf the projectile speed? It's seriously not that hard of a fix. And it's not like nerfing the speed a bit will break everything about devilites. They'll still be lethal.