Gremlins:
Menders should never mend or resurrect each other. They should prioritize resurrecting and mending the most powerful & annoying monsters.
Mortafires should fire homing rockets, not artillery rounds (no need to copy Demos).
Demos should be able to charge their bombs for a larger blast, instead of throwing or dropping bombs.
Constructs:
Mecha Knights should have all the abilities of Spiral Knights. They can shield bash, dodge in any direction every 8 seconds, use breakable bubble shields, use combos, and launch charge attacks.
T3 Gun Puppies should fire all 5 bullets at once.
Lumbers should deal only normal damage (+appropriate status) in all tiers.
Fiends:
Devilites should have their rapid dodging abilities back. Their ranged attacks should deal pure shadow damage (if they don't already).
Trojans should be more like Arkus.
Beasts:
Wolvers should have their tracking bite back.
Chromalisks should cloak whenever they're not in the middle of an attack. It should also be completely invisible.
Undead:
Zombies should have their tracking swipe back.
Howlitzers should fire all 5 bullets at once.
Dreadnaughts should do damage when buffing.
Slimes:
All lichens should have the spin attack, not just the colonies.
Lichen colonies gain tentacle attacks.
Giant lichen colonies gain gas dispersion (like their poisonous cousins).
Mini jellies shouldn't be able to stop brandish explosions.
gremlin:
menders: put a limit, yes. remove it, no.
mortafires: nope, those do their good job. mortafires make you avoid a spot for some seconds, with homing rockets you need some space or a wall.
demos: ok charging, but maybe add and not instead. those wouldn't be so pesky without throwing.
constructs:
mecha knights: erm, no. ok shield bash, but nothing else. they can combo and charge already.
puppies: no. if you really want, they can go 3-2 pattern, but in the current way it's harder to dodge if you encounter more than one.
lumbers: no thanks, I would like to use my elemental defense when a tree crushes on my head.
fiends:
devilites: if you really wish, ok. they are still kiling me.
trojans: are fine. arkus should stay unique.
beasts:
wolvers: ok.
crhomas: no. maybe the first, not the total invisibility.
undead:
zombies: ok.
howlizers: see gun puppies.
dreadnaughts: they revive they don't buff. and no. knockback, maybe, but not damage.
slimes:
lichens: ok.
coloines: you mean like gigant lichen colonies?
gigant colonies: and what status?
mini jellies: let's just say that with acheron buff it's not needed anymore.