[mrlich]

I am playing as Man against late Ermor. I've been able to maintain a defensive line for most of the game, but they just crushed two of my provinces. All of my provinces have castles and 125 defense. One that was crushed also had an army with my prophet and pretender there. Both of them were killed, but are thankfully immortal (Lich and Wraith Lord) and it was a high friendly dominion province so they are okay.

I had all priests on repeated Banish, but it just does not work against almost 2000 undead. What are my options?