I use tactics only do the basic stuff - have the party healer autoheal when people drop below X% health, and have my tank taunt and bash and stuff like that to get attention off of lower HP party members. My fourth party member is usually a mage tweaked to deal damage, so I have them cast their best spell against whomever the tank is fighting.
That's one or two tactics each per party member. Really, though, I'm stopping the battle every couple of seconds to cycle around and issue commands to everybody.