So for the Banished!Athena AU, this is just an idea but I think maybe in order to better blend in with the humans and y’know… survive, Athena would basically become the head royal guard (both so Penelope and Telemachus can actually convince the darn goddess to come inside) but also to better fend off the suitors and explain why she’s always around the royal family or training Telemachus.
Well, the more I thought about it it COULD work, but it'll be more of a personal guard than a head guard, after all with her condition she wouldn't be able to properly lead or train anyone for too long [her arms were practically rendered useless for the most part, it hurts whenever she moves them too much or too swiftly.] HOWEVER, it would be easier for her to be a more, personal guard, only needing to be close to Penelope and Telemachus.
She CAN still fight, but, she'd need the assistance of Ares for that.. And he's more than happy to help, keep her in shape, keep that warrior aspect of her even if she isn't as strong as she used to be.
Ares, instead of using quick thought, has the ability to almost silence the pain for a short period of time until Athena's body cant take it anymore, think of it as a more destructive form of adrenaline, though it has to be used sparingly, she's still advised not to return to fighting unless truly necessary.