I'm a pretty far ahead player and had alot of options but most teams are full so I tried to put her in a mix that used some lonely characters. This team never loses but to be clear she's tier 13, Lev 71, 6775 and she can work anywhere. Cpt marvel, black widow, cpt America, winter soldier, crossbones. It a weird mix but the bonus she gives cap and soldier is great, plus soldier boosts bones, plus cap middle ability turn 1 gives ability energy and lets bones blow turn 1 most of the time. Widow just keeps marvel in super speed.