CommentStreams:Dd7eb2a4db8864aadba564bbe514e5a0

Right now the endgame is about farming Castle 27, event boss 33 and finishing the event maps as cheaply as possible. From that perspective I agree with your ordering, Firefly seems like it could be useful. The other two artifcats are situational and you need to run simulations to see which decks and which enemies they would benefit the best.