Dr Fate and Dr Strange vs Sersi

All are at their best.
They both get time to set up their force feilds or other defensive methods

Damn, what did Sersi do to you?

I'll take the team.
Both have dealt with far greater enemies at the drop of a hat.

I don't know Sersi is pretty ubber .

Still if you put her up against one of them it might be close, but together they would rock her.

strange alone has taken on eternity, and with dr. fate its overkill

I think Dr Strange on his own can take her, guess you can through Fate in to be 100% sure