Allot of people want allot of things nerfed, but it's all really map problems if you think about it. Please read the whole post before commenting, just take a look at these three most hated enemies;

Feinds;
The big problem with feinds is the level layout on their levels. They ussualy ave a skinny bridge with holes in it that leads up to a hudge room. If you run into the room, you're surrounded, but if you don't, the devilmites block the room off, and you have no where to dodge too on the bridge. Screwing everyone without dread skelly or valkyrie lines.

Rocket puppies;
Same goes for rocketpuppies. In arenas, I can clean eight rocket pup's in seconds with a fair team, but on some regular levels, they create impossible situations. For example, those walkway areas with all the switches and a couple four by four places at corners. You end up on a two or three tile walkway with two rocket turrets at the end. It's impossible to make them hit each other, unlike the arenas, where you just get eight rockets to glide into one, and you have no where even try to dodge to on the thin path you stand on. Anyone without a hit and run fire gun like the firotech alchemer get's stumped.

Retrodes;
Once again, they are unkillable on thin walkways. They melee in advance, before you're in range, and can rotate, making them very difficult to approach head on. Plus, it only takes two or three to create a constant napalm strike. Completely pwning anyone without a good long ranged gun or owlite sheild. Though a nice stun vial can knock them back and cut their fire rate down, things like ice are useless since they don't need to move or turn. Secondly; the napalm dust marks that appear before the explosions can be hard to see. On a clockwork tunnel, the green marks stand out from the brown floor, but auroura isles grass hides the target patches well.