[Cainehill]

One thing no one mentioned for defending against Ghost Riders : Juggernauts. Sure, they cost 25 astral and require a S5 caster, but 20 protection with a lot of HPs and a 17 MR makes them pretty rugged and survivable. Even better, as size 6 tramplers, they tend to mow down the ghost riders en masse - much better than abominations.

I think I've seen 4 juggernauts take 6+ simultaneous castings of ghost riders with no losses. Of course, they _are_ expensive, and you also need a mage to lead them, and while the juggernauts easily survive remote fire/cold spells, the mages tend not to.