Currently i'm 3boxing a set of mages (thanks a ton speed for pointing me here!), but i'm wondering, when it comes to 3 boxing, is it more worth it to do 3 dps classes for ease of soloing quests or to have tank/heals/dps?

and for Tank/Heals/DPS how can that be set up to where the macros work and such. It seems complex, but maybe i dunno what i'm doing (new =D)