[Calaethis Dragonsbane]

I personally would retreat... if i was afraid of the lvl drain; then what I'd do would be to have my clerics turn undead, and have a mage cast 'timestop' and whack em with some powerful spells; if you have an evil cler, theres a 'good' chance of some of the enemy join you, at least for a while. Or of course, just attack head on, and have a cleric cast 'greater resotation' every so often. btw did you complete SoA, theres an item Aran linval gives ya, a necklace, which makes you immune to lvl drain, there are a couple of other anti lvl drain about, but I cant think of any off hand.