tempe
Captain Midnight
Bussing vocals to more compression only tends to be a problem when you have overlapping lines as the tail of the last line will duck the beginning of the new one
Nothing a little automation can't fix though, generally I bus all vocals of each kind to a respective bus and treat them as one track, so I end with a bus for cleans / screams / backing vocals and gangs. I do this so I have less faders to deal with and to save a little CPU.