For 22500 HP, I would’ve advised dropping a chunk on UDaken, Sentry, or Hood covers, but you only have two colors of each. Rogers pairs well with OBW, so you might drop some HP on blue Rogers covers. A better value proposition would probably be to buy 2 green Punisher covers and max him out.
Aside from those, there isn’t anything that stands out to me.
Definitely UDaken once you get a missing cover in tourney (so perhaps 3/4 less covers to buy) considering the new upcoming healing changes. Along with Sentry/Hood, I think Patch is also an option.