This doesn't really warrant any debate. Tholme has no feats or accolades to suggest he can do any good against Plo, and Aayla is simply outclassed by her senior. Plo Koon can remove either of them with the Force and summarily best them 1v1.
Plo is just better. Nothing wrong with losing to one of the greatest Jedi ever.
And lol @ Tholme = Luminara when he has so little to even suggest that.