A severe problem

[Saxon]

That Father of Winter is an AI favorite. The described plan is pretty much how I have stopped him in the past. Get the fatigue up one way or the other and, once he passes out, pretty much anyone can hack at him.

Since he kills pretty much whatever he hits, you don’t care about armor. Cheap troops are easier to get large numbers of, which is a key to this strategy. Morale is important, but as Ermor, you can get around that easily. With regular troops it is harder, but still possible. Summons are nice, since you don’t have to pay for them.