[Fiend]

2 things;
1: Drizzt does about 30-35 damage per hit so it would be very hard to defeat mano-el-mano.
2:***SPOILER***
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the way i defeated Drizzt(with me-ranger, Yeslick, Branwen, Imoen, Khalid, and Quayle) was to take out all the Knolls set all my level 3 cleric spells to animate dead, equip all my charcters with the best ranged weapons i had and to rest. Sure enough he was still there so i cast every animate dead spell i had and surounded him. i the told everything to attack him and just waited for about3 mins at which time i had to cast 2 summon creature1 spellsand moved me, yeslick, khalid and brawen in to attack him2 rounds later he was dead with none of my party members taking any(well branwen took 3-4 damage as i tod her to attack a hobgoblin instead drizzt by accident and the hobgoblin didnt like it)
I would of thought that drizzt would have been harder to kill with some sort of damge reduction or immunity to +1 or +2 weapons, mind u those spells arent available TOSC.