Well, Luke wouldn't be able to choke her, so that's out. I still believe that Luke would lose. Why? Cuz Serra is the complete opposite of the only other lightsaber wielder he faced, which is Vader. Vader used strong attacks, which for a young person like Luke would be easy to block. But Serra would be a whole lot more agile, with more direct attacks, instead of just powerful ones. Luke would have to transition completely for him to win this, and I don't believe he would be able to.
Remember in ROTJ, when Luke completely overwhelmed Vader with those fast and strong Djem So swings? That's what he'd do to Serra. I mean with two lightsabers, she can attack faster than he can, but her defense is a hell of a lot weaker. Vader, with all of his superhuman strength, was unable to stop Luke's Force powered strikes. Serra would need to use both sabers just to block, and even then, she'd have to be leaping out of the way of his strikes. She'd probably get some kicks and wounds in, but not much else.
HimoKun- Every single character in Star Wars uses a lightsaber, or throws or punches or jumps or whatever who has control over the Force uses it. In AOTC when Obi Wan throws the homing device at Slave I, he uses the Force unknowingly, just as an instinct. In ROTJ, when Luke throws the skull at the door panel in Jabba's Palace, he uses the Force Do you honestly think Luke could overwhelm Vader with sheer physical power? The dark side powered his strikes. And yes, Serra could do it too, but it would not be as effective, as she'd have to contend with Luke's power as well.