[Sythe]

Easy lemon squeezy. Go to your local store and buy as many monster summoning wands and a few bottles of haste. If you don't have enough cash then go adventuring! Or become a merchant selling weapons you don't use. Or just kill people and take their money. (Does it really matter near the end of the game?)

Now back at the temple try to just lead Tazok at your party and he should go down quickly.

Make sure your clerics and wizards all memorize monster summoning spells.

If you don't have a low level party member get one and give him or her a potion of haste and make em run through all the traps man the ones at the center. Once your decoy is dead go summon as many creatures as possible. After you do that do the same thing I did ATTACK!!!!!!!!! (I had an army of gnolls that time) The battle would be long and hard so just keep on summoning more and more creatures. What every you do DON'T STOP!! Sarevok cuts through them like a hot knife through butter. But not even he can take down all of em. If possible try to take down the wizard. Usually he casts area affecting spells such as fireball and many it takes out a significant chunk out of your army! Haste your archers and shoot like mad toward Sarevok! Hopefully by then Sarevok would be dead.