Many games I wish I could divide my forces between my allies. Send 2 priests over here to this ally. Have those priests follow him around and not get selected in a select all minions hotkey so you dont' have to keep reassigning them.
Maybe have hotkeys for priests gunners minotaurs and your summoned ones so you could at least control multiple groups at once.
This would overall help the control of generals. In which you could have effectively 4 differant groups running around causing havoc.