Assuming you stay with the healer concept, I would advise not bothering to attack when you have allies and instead concentrating on trying to keep them alive (which can be rather difficult in some cases unless you have custom healing spells).
The reason for this is simple: when it comes to battle tactics, NPC allies are utter
morons and there is a
very high chance that any attack you make will hit one or more of them in the back rather than the intended target since they have the distressing tendency to move
into your line of fire instead of staying out of it.
On the other hand, as a healer class you actually
want allies, unlike most of us who would gladly kill them off ourselves when possible to save the trouble if it didn't auto-fail the quest.
Man, this is making me debate with myself yet
again about making Savlian Matius nonessential and editing the Kvatch scripts...