Well, I use a FireWall / Whirlwind strategy.
I let Sassan attack Laiken, and I take on everything else. I use FireWall, jump out, heal, Rush Attack back in, Whirlwind, duck out, run around until FireWall is usable again, Rush attack back in, FireWall and repeat. By the time I finished with all the Undead and Razakel, I went to take out Laiken, who to my suprise, was already dead, since Sassan had killed him while I took out the other guys ;3
Firewall is a deadly spell! It's a must have!