Just started playing and was looking for some advice

Been rolling for hours, and from what i can gather getting a tank and healer are a good way to start the game (Particularly Wasp and Iron fist/Spider-woman). Finally got Wasp which was a nice surprise. My other hero was moon knight though, any thoughts on his current state in relation to PVP/PVE. I think i'll probably stop rolling since i'm fine with this set-up; if Moon Knight's not garbage?

In regards to the Avengers pick, Widow and Iron man are the most useful based on my understanding? Picking Widow's okay with this set-up right?