[The Ozzman]

Nothing can be easier than the method i used when i 1st beat the game. Have your party situated about an inch below the seal. Make sure the tanks have drinken the following:

your highest potions of giant strength(preferably storm)
potions of heroism
and then the appropriate potions to get your NPC attributes to 18, especially dexterity.

With your main tank(or whoever has the spider's bane equipped[and the boots of speed too!]) go around the seal to the right slowly until you uncover tazok, he will say something and dissapear, quicky go join the rest of your party and wait until he appears in front of you. I think someone casts web but as long as you have the spiders bane equipped it will not hold you. Tazok will appear in front of you and may even get in the 1st hit but have your whole party attack and crush him. When he is dead, cast haste on your party, draw upon holy might on your main character, and with any clerics you have. Then go back around the seal to the right until sarvok sees you. Once you have finished the dialogue with him simply rejoin your party beneath the seal and wait for him to come down. And then basically bum rush him. Should be super easy!