You may be able to lure one or two behemoths away from the group. Don't turn the corner to where they can see you; just send a spell that can damage creatures around corners. The damaged ones will come for you (if the corner isn't too sharp), and the rest will stay behind.Wands and scrolls are good for this, if you don't have the spells. Toxic Cloud is ideal, because it only hits one creature at a time. Rock Blast is next best. Depending on the behemoths' locations, you might be able to hit them around a corner with Fireball or Ice Blast. Implosion is great if you can get a glimpse of a creature's fingernail.
Another option: Let the group see you. Run away a little, and enter turn-based mode. Use Slow or Paralyze on some of the behemoths, until there are few enough fast ones that you can fight them. Then keep running, luring the fast ones well away from the slow (or stopped) ones before turning around to fight them. (This assumes that your Earth or Light skill is good enough for the spells to last a while.)
BV
