[Alneyan]

Jurri: The Machakan kamikazes are the key to the problem. Remember those Sorcerers that just wouldn't die? That should work fine against the undead, too.

That aside, do you think Phoenix Pyre would help against the undeads? Witch Doctors can cast it, and those can be everywhere, and the spell deals some damage over a widespread area. Of course, fatigue will kill the mages sooner or later (Summon Earthpower may help here), but it might just work out. Of course, getting to that level of research is a problem... but then anything involving the undead is a problem.

Spirokeat: Dominion is mighty hard to undo, and the undead can easily afford maximum Dominion. If you can pull it out, everything will be easier though. Friendly Dominion isn't still enough for Immortals though: assassination spells will remove all their items and send them back home regardless, and commanders that keep on dying aren't that useful. I'm addicted to Mind Hunt now.