Might move this thread eventually but I figure it's a discussion at least.
But alright! We have a sort of interesting world in Spiral Knights that take inspiration from plenty of different areas, but enemies come in all shapes and sizes.
While all themed, pretty much all monster families in Spiral Knights have a unique twist to them. While beasts and slime monsters might have similar enemies in other games, typically they have different artistic direction, such as our "bunny" enemy being mostly a bouncing mouth, and our slimes having spikes.
This is more of a visuals sort of scenario, but if you have an idea on how it would work you can say that. Try not to be too complex with your gameplay roles - mostly want to look at what an enemy could be!
There could be scientiests, shamans or doctors. Actually this role would be ideal by devilities and gremlins, since these are the more smarter enemies out there. But also the wilvers could have some kind of beastly shamans. Why not introducing werewolfs into the game? So the beast fraction could get another face into their family.
Actually I would like to see more varity in the beast and jelly family since they have so few varity.