I'm operating under the assumption that, technically, you don't need to put EXP into levels at all, and that Outlaws would probably be dying often anyways, due to their Outlaw-y nature. Still thinking about it though.

Can't you make up for your lack of abilities and feats with good equipment and skills? Sorta like Char with a Zaku? So all things considered, your overall fighting ability wouldn't be THAT hampered. You'd be super effective against high level players, while with low level players you would overpower simply with the quality of your equipment.