Best party: 2 clerics (endurance only or 1 with endurance/intellect) and a mage and ranger... use double annoint or 1 annoint, hail of arrows electrical storm and if necessary litany of pain... aim for quickness items, kill enemies before they attack.
STRATEGY IS THE SAME AS PREVIOUS GAMES:
Have a meat ball in the front to take big melee hits, in the back have mage or archerer to do mass attack, just level up at first, until you get down to lvl 5, when you should have all speed items to get your speed above 60, so you can do attack. If you have a cleric, use the spell that gives 175% attack damage plus, and put on mage or archerer, then let him attack. All your characters will attack before enemies have a chance.