Luke became possibly the strongest Jedi to ever live. Vapaad means nothing to someone who has discovered abilities in the Force that possibly no other Force user in the SW history is knowledgable of. One of Luke's abillities gave him the power to kill instantly and we don't know for sure if this power can be blocked by Force or lightsaber or not, but I doubt it, because the power is unknown. Other reasons are...
1) Luke was able to charge through the entire Yuuzhan Vong HQ, basically on his own (yes Jacen and Jaina were with him, but it says in TUF that they did almost no work). Since this is the place where the YV leader is, there would be thousands of Vong, maybe even 10 000 or more, yet Luke wasted them all.
2) After doing that, he faced off against 7 or 8 slayers, either way it is impressive, Kyp who is supposedly very powerful could not even take one and he landed dozens of hits. Yet Luke was able to kill them with one hit, that means he is either exceptionally strong, or he was powering his weapon with the Force.
3) Then he defeated the Supreme Overlord, who on his own would be a match for MANY Jedi.
4) Like said above...In the final YV battle, Luke used an unknown power, to instantly kill a slayer. It is described as being like green sparks. Jaina also describes him as being like the centre of the Force. The Force flowing through him, he was like a malestrom of Force energy, unstoppable. Jaina also described him as being calm and focused, and his blade was like 10 or 20, all moving at the same time, with one purpose.
5) Luke was also able to manipulate black holes and gravity.
6) Luke was also able to knock down AT-AT's like they were nothing, he could also destroy entire armies with the Force.
7) In the Black Fleet Crisis, Luke removed an entire planet from view using the force, he said it should last indefinently. He was also able to make himself invisible and unable to be sensed through the Force. Also in the Black Fleet Crisis Luke rebuilt Vader's old fortress, he also made it invisible. He did all this with out being sensed through the force, and this is on Courscant.
8) Luke also trained underneath the clone emperor, so he would know about the Sith as well as the Jedi. Luke also defeated the Emperor's force storm, which was massive and able to destroy ships.
9) After defeating the clone emperor, Luke discovered an ancient Jedi library, with long forgotten knowledge. Luke also didn't restrict his knowledge to just the Jedi, he hunted all over the galaxy, searching for knowledge and power from everyone he met. Luke also learned under the Emperor and used the Emperors library, which gives him a full knowledge on both sides of the Force.
Luke takes Mace and Anakin out, possibly easily.