One trick I have done and it has ensured me victory is pick up a load of oil barrels. You can drop as many items as you wish in combat. I then drop 5 firewine and oil barrels. Misty step out of there and set it on fire. On the one hand it is dumb game mechanics but on the other hand I have not beaten the Minotaurs or Spectator and Drow without this tactic.
