Tactic: Last of the Tuatha vs. tramplers?

[Minrhael]

In addition to summons, you have longbows you can set to fire at large, add wind guide and (if you can get a fire3 mage somehow, which is difficult unless it's your pretender) flaming arrows, and they'll hopefully break before they reach you assuming your troops are set in the back. This will also benefit your daoine sidhe who should get at least one round of windguided hopefully flaming javelins in before anything hits them.

And combat magic of course; false fetters will slow them down long enough to be arrowed to death (though determining when to script it is a pain, usually 4th or 5th spell if I'm in back, and the AI never seems to cast it if it's not told to); and the various lightning spells will generally do the job just fine.