Then Wonder Woman needs to play smart and take out Namor as quickly as possible with the lasso because once this gets into a brawl, despite how useless the other two would be, she goes down quickly. A fully hydrated Namor would probably have the slight edge on Hercules in strength and has defeated the Hulk in a brawl. Those are both beings who I already consider superior to Wonder Woman personally.
If the team is in their upper showings, then Team wins a solid majority -- WW would be hard-pressed to take down those three even under the best of circumstances when they're at the top of their game. If in their more "classic" personas, then she wins a majority. If using current issues, then Team will win, but WW has at least several wins via the lasso and her speed; if she can take down Namor fast, she can eventually beat Ms. Marvel and Wonder Man, though she'll be pretty roughed up afterwards, and the situation will edge in her favor.
This isn't a very good choice of combatants, as the answer is pretty clear without much thought... just saying...
__________________ Why am I here commenting on this crap?
Well, useless is an over-exaggeration. Ms. Marvel with her energy powers, and abilities can definitely be a good distraction and get in a few good licks. Wonder Man seemed to just go down the food chain in my opinion.
Technically speaking, he should be as strong as Thor or Sentry or any one of the power houses but his not unfortunately.
Team wins. Especially if she lets Namor get his hands on her, but she takes some wins playing smartly by using her Aegis and Lasso in combination with her superior speed.
I don't think Carol or WM have the ability to keep up with Diana's stats at all. Namor has the durability and strength, but her speed (as usual) makes him significantly less of a threat.
I'd say she'd take a majority. Not do cry about bias or anything, but if it was these three against Superman he'd be getting 10 out of 10s from a majority of posters.
The only way I see the team really beating Diana is if it was Binary.
Namor's the biggest challenge without a doubt, but she's still better than him, and I bet a blast of Zeus's lightning would eliminate any hydration rig he has.