I'd guess you already have healing health, regenerating magic points or however you call it in the game.
Other suggestions might include pickpocketing, create diversion, ambush, hide in the forest/night/cave/… , potion making
More combat related: Shield bash, poisoning(losing health and/or abilities for a period of time/turns), bad/good luck (bad luck makes you lose your weapon, hurt yourself, or other things. good luck means you make a critical hit hurting the other more, make the other lose its weapon or break his shield…)

I'll be back later maybe …