Apples and oranges, really. The Emperor made an exhaustive, concerted effort to master Force lore for the express purpose of maximizing his own power. Luke never really did that. The closest he came, I think, would be when he and Ben retraced Jacen's 5-year sojourn. And that was less about harnessing new techniques than it was understanding what the hell happened with his nephew.
Luke and the Emperor approach that sort of thing very differently. Also, I would say that Luke being at "the height of his powers" isn't quite the same as realizing his full potential. The sourcebook is just saying that this is the strongest he's ever been.
Luke studied a variety of sources, including Palpatine's and Plagueis's works, and demonstrated a range of esoteric Force abilities, ranging from shatterpoint to that technique he used to pull Callista out of Abeloth, some of which he only displayed after TUF. He also had accumulated a significantly greater number of combat experiences than Palpatine, and personally visited and interacted with the cultures from which Sidious plundered. Plus FotJ makes it clear that he can learn incredibly rare and random Force techniques in like four hours.
Bend the knee to Sidious's superior. 🙂
Originally posted by The Ellimist
Luke studied a variety of sources, including Palpatine's and Plagueis's works, and demonstrated a range of esoteric Force abilities, ranging from shatterpoint to that technique he used to pull Callista out of Abeloth, some of which he only displayed after TUF. He also had accumulated a significantly greater number of combat experiences than Palpatine, and personally visited and interacted with the cultures from which Sidious plundered. Plus FotJ makes it clear that he can learn incredibly rare and random Force techniques in like four hours.Bend the knee to Sidious's superior. 🙂
Soothe your butthurt, my child. I never said Luke didn't study a variety of sources nor did I insinuate he didn't have anything other than a high learning rate. I'm saying he didn't pursue knowledge as vigorously and selfishly as the Emperor, which might explain why Palpatine kept pushing his limits until shortly before his final death.
Even if the studying gap existed, Luke could easily have compensated for this by his regular participation in combat missions - see AotC to RotS Anakin.
The point is that his potential probably hasn't been reached by NJO, and it's unlikely that the ravages of age would outpace the growth in someone with the second most potential in the mythos. Look at Dooku, or even Bane.