Maeve has two keys:
One is for her S1 and 2 self, that was already stated as the second most powerful (in that deleted scene) and while she doesn't have many feats, she was the turning point on the Stormfront fight (though she stopped using her plasma bolts for some reason), overwhelming her in combat. Kimiko and Annie still somewhat scale to her, as by scaling Maeve would be like 10 times about baseline 9-A and she has no reason to hold back on Stormfront, and both Annie and Kimiko could hurt her.
Her other key is for S3, where she states to have been training for at least a couple months (seriously enough to also stop drinking) with the sole purpose of putting on a fight against Homelander (she believed she could only get some hits in, but at the end she even made her bleed). This key scake to HL, but remains inferior.