Hi,
You can try waiting until your fighter is at a higher level before dealing with the trolls or the orc drummers. Trolls are vulnerable to electrical attacks. Repeated use of lightning or burning wall will be enough when you fight them. Make sure you have enough potions with you. (Restoration potions are recommended.) As a fighter, getting a weapon with frost will also make the game easier. You can also cast freeze on the orc drummers and attack them. If they unfreeze, recast the spell and attack again. Repeat this sequence until the fight is over.
Thanks.
