Update:
You dont qualify for Rapid Strike. (or was it Errata'ed?) *searching*
OK, you can use it, but at a -5 penalty... wait Lightsabers are light weapons right?
Anyways, if you can, exchange it: Powerful Charge
How do you get 2d8+10 damage?
+4 Str. +4 Lvl. +2 from what?
Or if you use the Lightsaber two-handed: +8 Str. +4 Lvl. = +12
With Powerful Charge and Two-handed: +17 to Attack, 2d8+16 Damage