Because then that would ruin the whole concept of splitting the classes off to start with lol.
I think its a good idea to split them off in 4 acctually.
Like on 4Heros they're always getting complaints such as;
OMG TAOS FIREFOX OVERPOWERED
OMG TAOS SHUDNT BE ALLOWED PETS
OMG TAOS GOT BUFFS
OMG WARRS 1 HIT ME
OMG WIZZIES FLAMEFIELD HURTS 2 MUCH
OMG WIZZIES BLIZZARD ALMOST 1 HITS ME
etc etc..
Avoids moans
