Mutants: Just oogy looking monster people with acid blood
T1:Spawn Expendable meat
T2: Monstrosity: Tentacle beasts focused on CC effects
t3: Tyrant: Big beater, Causes terror on the battlefield(debuffs)
Upgrading them would 1: give them acid blood(splash damage) 2:Extra tentacles and other nastiness.
Knights: I Also would like to see this
t1:Squire: Broadsword/Shield defense style kit
t2:Paladin: Uses 2 handed weapon and a psuedo healer(thinking +regen over an actual heal)
t3:Seneshcal: Your black knight style big boy.
and to be a bit cheeky over all this I'd like to see mercs get a pass and it would be like getting a new primary