In the old WEG system you added your Sense to your Attacks with lightsaber and your Control to the lightsaber damage. If you were Dark Vader, ROTJ Luke, it meant who ever hit first won 
In the early D20 Star Wars they had Wounds and Vitality points and there whomever got the first Critical Hit won
Saga also had Damage Reduction which Lightsabers ignored but I did not really want to add the feature back in. I was thinking that lightsabers might also be able to ignore Reflex Armor Points. It did not have this feature in Saga though, which I thought was always weird that it basically ignores all Damage Reduction points but not Armor Class Points. But I think that might make lightsaber too good.

In the early D20 Star Wars they had Wounds and Vitality points and there whomever got the first Critical Hit won

Saga also had Damage Reduction which Lightsabers ignored but I did not really want to add the feature back in. I was thinking that lightsabers might also be able to ignore Reflex Armor Points. It did not have this feature in Saga though, which I thought was always weird that it basically ignores all Damage Reduction points but not Armor Class Points. But I think that might make lightsaber too good.