Donkeys seem to be balanced. Laugh factor of peasants on donkey is too much.
Would like a donkey ejection seat though....Maybe, some kind of tinkerer invention, or donkeys with jet rollerskates and nitrous?
And elephants with archer buckets, elephants get "unbalanced" mechanic and move real slow, the slower the better to shoot the stupid archers on it!
Um, and Ima call my donkey "GUMBY!"