I would have thought that learning shatterpoint, "Jedi Killing Techniques" and the whole 'Sword of the Jedi' thing might have given her enough to scrape a win at least going all out.
Jaina is incredibly strong in the force, as shown by her piloting skills, and her strength when working with Jacen, probably b/c she is the Great-Granddaughter of the force (The Force/Plageius- Anakin- Leia).
She learned tactics from Boba, and isn't chained to a mentality of fighting on even footing.
Bottom line, she might have a chance (say 4/10 wins) in an all out fight w/ Mace.