I recommend having creature out full health, Sassan Healing you and as soon as you clear cutscene RUN/JUMP to your right into the V shaped corner. Let Sassan handle a couple of the pawns. Begin fighting from the corner ..if Warrior use rush attack on Razakel smack him around jump back to corner heal rinse and repeat. Or if ranged fighter just concentrate on Razakel from that corner. He dies=fight over!