who could defeat NJO luke

Look in the new Essential Guide to Chronology. He did use it and keep it with him and it increased his power by a lot.

I'm looking and it's not mentioned. The Kaiburr crystal's power decreases heavily when it's away from the temple too, so it'd be near worthless off Mimban. Here we are:

"The Recovered Kaiburr crystal did not perform as expected, Mimban appeared to be a planet with a biosphere that magnified the Force. Luke discovered the power of the Kaiburr crystal decreased in direct proportion from its distance from Mimban and more specifically the temple of Pomojema itself."

On Mimban it was supposed to make the user 1000 times more powerful. Even if it only worked at .1% of how much it would on Mimban, Luke would be twice as powerful.

It'd have lost its powers completely after a while. The only trace of its power is in the lightsaber.

And .1 percent of 1000 is just 1.

Yes, it increases his power by the original amount, which added to his natural power is 2. 1 + 1 = 2.

Where is your proof that is became completely worthless? It decreases a lot, but it still makes a heavy effect on the user.

One times as powerful?

And it says here Luke only used it as an oddity and kept it in the temple for lessons....meaning it was blown to pieces with the other temple artifacts when the Vong destroyed the temple

Luke still has the shard that was in his lightsaber and the piece of it that he keeps with him. It never says he kept it in the Temple.

It says he kept it there as a curiosity for lessons to the Jedi he was training. The shard in the lightsaber could easily be Mara's saber and a small shard that weakens periodically and just strengths the saber?

He never kept a piece with him, either that's never even hinted at

It says he used it as a teaching item. Never does it say that he kept it there. It also says that later he experimented in using it as a focusing crystal for his lightsaber. Pre-Endor would not be later.

It states nowhere that he kept it on him and NJO said the most valuable Jedi artifacts were destroyed in the temple by the Vong...this point'd be neutral, now.

Why wouldn't he keep it with him if it increased his power? We know he kept part of it in his saber, why would he leave the rest behind?

Why would he, especially when it was deadened to the point of almost no use in a time he thought was peaceful? This is a dead point now.

During the Yuuzhan Vong War was not a peaceful time. He would bring all of the power he could to himself when attacking, and he did.

Like I said, even if it only was a thousandth as powerful as it normally would be, it would double his strength.

He was forced off Yavin...since the most powerful artifacts were destroyed there, that could include the Kaiburr crystal.

At one thousandth, mathwise, it'd not help his srngth at one. Once one is still one. Plus, he went originally to the Vong wars for diplomacy and wasn't back on Yavin in time to save the temple

He would still take it with him. Many artifacts were destroyed, but no mention of the Kaiburr crystal is made as being one of them.

It would increase his power by one. Added to his original, thats two. If you can't see that, then you are blind.

No mention the Kaiburr wASN'T destroyed and it said THE most powerful artifacts were destroyed.

Face it, this is a moot point as he's never mentioned to have the Kaiburr crystal once in all of NJO. and it'd Multiply his power by one. One times one is one. Nothing said anything about addition

He actually is. He is said to have part of it in his lightsaber. And it's not multiply, it adds to it.

You have to prove that it was destroyed. Burden of proof is on you in this instance.

Considering:
A. he's never mentioned with it.
B. It'd be almost worthless, a SHARD would do nothing but increase the saber as said in guide to tech.
C. It said THE greatest artifacts were destroyed and the Kaiburr crysal's never mentioned again...
I may not be able to prove exactly it was destroyed, but you can't prove it wasn't and that Luke used it

You're not understanding what I am saying. Unless you can prove that it was destroyed, it can't be considered that it was.

A shard would still make him more powerful. Even if it was a tenth of it and it was a hundreth as powerful as it normally would be, it would double his power.

It was mentioned in the Essential Guide to Chronology.

and there's NO WAY to determine if he EVER used it. I'm going to go into the old marvel comics in a few minutes to determine it.

And it was a SPARE saber he made when he used it to fight Lumiya, one with a noticeably blue blade. I'm looking at the exact section in the chronology, NO WHERE is it said it made Luke stronger and no where is it said he carried it. Unless you can prove he did and it made him much stronger- a shard, which'd be 1/1000th already and decreasing massively...