I've gone back to Hades this week quite a lot. I've been achievement hunting, basically, at this point - I've more or less run out of plot, there are some unique dialogues I've not managed to see yet but they're so arbitrary in the RNG needed that I don't think there's much point in chasing those.
I got all 3 courtyard items unlocked, which involved a win on level 32 pact of punishment setting, something I am definitely not planning to do again any time soon: even with damage reduction on that was a bit hellish. Also tricky was the achievement for getting a 30 percent damage bonus from a particular side item, which I did eventually manage - it improves the bonus any time you complete a room without taking any damage, and I am not the nimblest of players.
All I really have left now are two of the minor prophecies - one duo boon and one weapon enchantment left to go - and one steam achievement, to max rank all the standard keepsake items, which basically is just a case of grinding through about ten runs to level them all up. None of those should be technically difficult now, it's just a question of whether I have the time and energy.
I really should go back to making and testing more of Exile Princes.