Since Aion didn't have to be stealthy anymore, he could let loose… he would wage war by himself and annihilate a country. So, it doesn't matter if the guys in the fallen capital manage to alert their allies. With that in mind, he summoned his death knights and gave them the order to attack all of the enemies and bring anyone who looked suspicious or out of place.
"My healing skills aren't amazing aside from when I use them to heal myself with Inner Release," Aion thought while he was healing his sisters and their husbands. "Still, even with my high magic, I can't make them recover the body parts that they had lost… I can only rely on Priest and on the evolutions of that class for that."
Artemisia said that some of their ancestors got good enough with water and light magic to the point that they could heal lost limbs. However, it wasn't just a matter of high magic power… so, Aion couldn't just use a lot of mana to solve it.