Are we forgetting Sith Sorcerry? That's something not seen in NJO or LOTF. Zannah would kill both of them while they were swatting at false images. Ben isn't that good with a lightsaber and still developing his power. Luke would be doing all the fighting. Luke may be the greatest Jedi Master, but two engaging two Sith at one time is more than he can handle.
I would tend to agree with Darth Truculent on this one.
Bane is indeed very powerful as mentioned a million times already. LOTF Luke is above Bane (everyone) obviously, but with the addition of Zannah, Ben goes down first. Luke would be distracted and feel the urge to help/save Ben.
Bane engages Luke, or Zannah messes with his head. But if Luke goes all out on the attack, Zannah would be overwhelmed quickly, and would not get a chance to use sorcery(like in ROT where she fought that buff alien guy, she didn't have a chance until he was distracted).
And Luke would destroy Zannah in saber combat. Then it would be Luke vs. Bane. It would be pretty hard to get through the orbalisks, and unless he figured out their weakness, he will need to concentrate on attack as well as defense, while Bane is focused only on attack. Bane's and Luke's lightning attacks are on par with each other, but I am positive that Bane can take more physical trauma.
EDIT: I forgot that Luke had the shatterpoint ability... maybe that would give him the win.
I really don't know who wins.. I'm tempted to say Luke just cuz he is Luke, but I hate seeing Luke win all the time.
oh yeah one more thing.
You know the thing Luke did to Caedus where he used the force to prevent Caedus from moving right? in INFERNO i think..
is it a stasis, or is it using the force to puch Jacen into his chair so hard that he couldn't escape?
just wanted some clarification on that.
What consequences would Luke's emotional state yield after seeing his son fall? In pg 493 Luke did confess that he would be willing to skirt the dark side very closely to safe guard his niece and nephew. Id imagine he would uncautiously use the dark side if his son, who's torture is enough to get him into a battle rage were slain. Hypothetically this would probably allow him access to his raw power. Could that ensure his victory. Or would his possibly clouded judgement + the Sith beat him.