Maybe I'm missing something but I don't understand how to defend the garrisons. Even if I leave mercenaries in them, in just a few moments the attackers are way too powerful to be dealt with, and it seems like I have to run around like a chicken with it's head cut off just to keep the garrisons locked down.
Am I missing something about how to level the mercs in garrisons or something?
I guess I could rotate out mercenaries and train them in my party but I feel like that would be a losing battle too.
Edit:
Do you have any sort of analytics in the game to detect what is tripping people up?