So I recently got a star wars bundle on steam, and decided to start Force Unleashed.
Something that struck me, though, is that at the start of the game he isnt actually all that impressive. He can move silouette 2 Tie panels around reliably, but only at short or medium range. He can "force leap" a distance I want to call Engaged, and his saber fighting, though flashy, takes two or even three hits to take out ordinary (armored) humans. He doesnt even get force lightning until the second adventure.
His big deal is having CONSISTANT access to the force. And he's already a darksider. So we can give him Force Rating 3, with a morality drop to Dark side, and he's consistantly hitting 2 dark pips on every roll. (and when he doesnt, destiny point) This also sets him up for picking up Protect unleash with his XP from the first mission. We can do this with Human + Knight level XP easilly. (we could ALMOST do it with Human + Obligation at starting XP, but we want force powers to use it too, and I dont really see Starkiller as a Sage)
I see him starting as an Aggressor/Emergent. 75 XP down the "Fearsome" column for FR2, 20 for Emergent, 75 (or 95 if you want uncanny sences/reactions) for force rating 3. Alternatively, Guardian/Protector can do the same thing as Warrior/Aggressor, with more stabbing yourself with stims.
As a human, a single free point in lightsaber and a brawn of 3 probably best represents his fighting skill. Perhaps he can pick up a saber style later- for now all he needs is to occasionally hit with his unmodfied Illium crystal.
For force powers, I'd give him the Basic Enhance (add his FR3 to athletics) to represent his anemic "force leap", and a reasomably upgraded Move power. He hasnt really demonstrated any other powers (aside from lightning) in the first level and a half, and it feels like vader molded him as a combat character- subtle powers like Seek and Sence dont seem like Starkiller's style.