as soon as the battle starts, use tactical pause and chug a health potion, then unpause and jump away. I'm a ranger so what i did was stun the divine and use exploding arrows on all of the paladins and whatits. they went down pretty fast with splosive arrows and i kept stunning, poisoning, and sploding the divine will running away, i didn't bother with zandalor until after i killed the divine, i just waited for him to heal and used stun and blasted him with everything i had, creature, demon, poison arrows, split arrows(at close range both hit your target), explosive arrows. and any magic i had. i also buffed up in the beginning with +dex and +str potions too. almost every 5 or 10 seconds i paused to chug a pot. good luck!
