i only agree with oak in the later stage, if you spec oak to pwn in the last lvl and achieve reaching those lvls without more deaths than opponent its a win, the passive pets are strong and easy to play
the problem is at start, to strenghten the pets you have to put a lot of talents you dont benefit at start and you are pretty weak and without CC
so in the end i find it quite balanced, the problem is 99% of ppl have no clue yet how to play well, if you play assassins vs oak you SHOULD make some kill since oak have no chance to kill you
erebus on the other way i just DONT think it is OP
its a bit weaker than oak even in the later stage, he got a very good CC with stun and even survive with teleport and vortex but his pets are WAY weaker and they regen slower than oak
oak drain life/mana too so oak in the last lvls is really strong while erebus doesnt scale so much, probably a bit stronger at start
l2p guys