You culd use daylight pellet to blast drows blind immediately after the blast but blindness lasts 1 round. So you got only 1 free round to run away but it does not remove chance for pursue. Also it gives another player chance to loot your char body and get XP. As incentive if you succeed escape your new char starts with one free magic item up to 8,000gp worth (any GP left from item purchase are not saved).