smoky tune

I've tried different tactics for Drizzt and company as well. And the most efective one was as follows:
1. Talk to him and make him hostile.
2. Hide all party through Invisibility 10' radius, Mass Invisibility spells or by drinking potions.
3. Move to the lower right corner, buff and prepare.
4. Staying out of sight cast Greater Malison, Web and Slow spells to neutralize as many of them as possible.
5. I ussually preferred to kill everyone but Drizzt because eliminating him may take quite long. Just make Drizzt busy running away from him while beating others. When Drizzt remains alone, he's not that a problem if you have good tank and Lower Resistance spell.

the slow spell reduces their regeneration speed. that helps much.