Mind Flayers are annoying but here's an easy way to deal with them. If you have a two handed fighter who is good in long swords, but the drinker in his main hand and the arbanes sword in his off. (Or you can screw the arbane sword and cast free action on him.) Then have him gulp down some potions of mind focusing or genius. Once his intelligence is maxed out chop down those illithids. That should be easy now, you'll be immune to their stun and domination, and almost immune to their intelligence drain. If you get drained low just wait a while. The effects go away.
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Burn to a crisp!
Redblueflare (Call me Red!)
