it really does come down to match ups. i'd say team 2 has the overall power advantage between diana and zee. zee has some high level tp that could be used to wipe out anyone on team 1 except sersi, maybe. we've seen monica stopped with tp already. she would need to blitz zee from the get-go, and go hard because zee has some good durability feats and can cast really quickly and without speaking--or she could. not sure if rebirth zee has done that...
i'd need to see some pretty uber absorption feats for starfire to think monica couldn't overload her or just kill her with some more exotic form of radiation.
sersi also has some high level tp skills, but she couldn't bother zee (and may regret even trying) while diana has some high level defense. she could take out mera and kory though. carol simply doesn't have the power to hang overall with diana or zee. more often than not i could see it boiling down to diana/zee vs sersi, or maybe sersi/monica. if zee has a chance, she ends monica for sure imo. and diana has faced and between the REAL circe, who i'd say was more powerful (slightly) than the eternal.
good match up gs, but i'd take team dc in what would be a bunch of close, fun matches.