[Cainehill]

I've rather enjoyed using a PoD with Caelum, adding on several magic paths on top of death - typically fire, earth, and some nature, to complement Caelum's national mages for site searching, forging, and summoning.

While not immune to cold, being undead means that it doesn't suffer increased fatigue from Caelum's cold weather, and it doesn't require use of boots for flight, meaning that it can keep up with all the flying mages and troops.