Originally posted by Darth Truculent
Arhael,Anakin [Solo] actually had far more potential than Jaina and Jacen. Kyp stated that Anakin was the future of the order. If the writers had killed off Jaina instead of Anakin, the lightsaber fight between Anakin and now Caedus probably would have been different. The two trained against each other and Anakin was getting better each time. It can be argued that Anakin's only equal was Ganner at Jedi Knight level. Both took numerous wounds in a single fight and performed Starkiller like feats until their deaths. During the final battle in the Yuuzhan Vong War, Jaina was outclassed by the Slayers where Jacen and Luke were not. Jacen took out Nom Anor and Luke killed Shimmra - both serious heavy weights in the war.
To the fight between Luke and Caedus, Luke had to worry about Ben. Can't remember what book, but Luke humiliated Caedus pinning him to the floor without even moving. Caedus was fearful that if Luke discovered the truth that he had killed Mara, Luke would unleash hell on him and there would be no way he [Caedus] could survive. He didn't expect Jaina to ambush him and was terrified that Allana would be killed in the 2nd Galactic Civil War. That's why he was killed.
I don't really think that Anakin had more potential, although he probably did. Kyp stated that not really because of his power but personality. He was very kind and completely selfless.
In first NJO book Jacen and Anakin dueled. Anakin lost and was very disappointed because he trained much harder but for his brother combat was never priority. Ganner was no equal to Anakin or Jacen, although had great potential but his arrogance was his greatest enemy. Both Anakin and especially Ganner performed amazing feats during state of oneness, yet, Jacen's oneness during fight with Onimi was much stronger and deeper.
During final battle with Yuzhan Vong Jaina fought against Slayers as good as Jacen. If you remember, Onimi got her attention and she followed him, then he managed to outwit her by poisoning.
Luke during fight with Caedus gave out best he could. He tried to kill Caedus instantly and ruthlessly. The very first strike Jacen survived only because of his amazing reflexes, his kidney or leaver though was partially burned. If not for circumstances Luke wouldn't get that many injuries but fight itself would be much much longer.
Yes, Luke did humiliate Caedus by pinning him down. A lot of credit for that goes not just to Luke's power but his talents of using it. Plus, he caught him off guard. In the middle of the fight Luke wouldn't be able to do that.
Yes, Caedus was terrified that Allana might get killed. But my opinion is that it is the main reason he was able to give such a long fight to Jaina, otherwise she would kill him much faster. When you need to protect someone, it gives you much stronger determination and reason to win.
As for Plagueis, he was much more powerful. As I said before Caedus was using only his own potential coming from within, while Plagueis resorted to Sith Sorcery, draining emotions and life energy from others and other ways that make him much more powerful, than Luke or any other Jedi. But that's where his advantages finish. Power is not deciding factor. Jacen's capabilities in combat, the way he utilizes the Force during combat and taking advantage of fighting ground are clearly above Plagueis.
On the other hand Jacen stands no chance, if he fights Plagueis near a dark side nexus place like Sith academy. Plagueis would imbue himself farther and utilize Sith Sorcery in a way that Jacen would not be capable to counter as Sith.
In the end I don't know who would win. Both have uniquenesses and immense potential. Imho I side with Caedus for his versatility but in terms of power Plagueis as proper Sith wins by far.