The Force. Duh.
Though, my reasoning is that you actually get three of those by choosing that: here. It is said that (and often proven that), most Jedi, though they are at least Proficient at their chosen style of Lughtsaber combat, actually just let the force guide them. It's not always just a small force guided block or move; entire syles are dependent on having the force essentially use you like a puppet in all but the most basic things, like stance and actually being able to swing a lightsaber without getting tired. Not only that, but the best Jedi pilots, excluding people like Luke, Anakin, and Corrin Horn (who have noth natural talent AND the force to guide them), let the force guide them in flying as well.
So I'd still be an above average pilot, and a decent Lightsaber duelist, even though I'm only chosing the Force. Of course, someone with real training in either of those would kick my ass at them, but I'd at least be able to get around using them. I'd also have the force as an overwhelming fallback, if need be.