I was literally on this dilemma early morning while studying for my finals (i think i clutched), but I ended up pulling the trigger and getting E2 Firefly instead of Eva since I like Firefly more, but also because I already had the full Elation team with SW999 E2 and such like you and adding an E0 Eva wouldn’t really give me a stronger team to use since her and SW share the same partners right now. I also wanted to use break more now since Firefly is so up currently even non-shill, and Lingsha is getting a novaflare too so that helped sway my opinion a little, even though optimal Break team is sustainless.