I always thought Kavar was stronger than vrook, he was the leader of the council, although i maybe wrong. Then there is Sids vs Dooku. With this fight i believe it would be a long brawl but Sidious would win by him selk if not with kavars help
It seems to me that in Kotor 1 Vrook and Vandar are in command the rest is just kinda there. In Kotor II Vrook judges over the Exile and his word seems to be more important then that of anybody else in the council. Making it seem like he is in command, honestly I'm not quite sure if Vandar was there or not but it would seem logical.
Kotor I portrays Vandar as the leader a Yoda like figure and probably more powerful, Kotor II does the same for Vrook.
Also a strange thing, Vrook is on Dantooine in Kotor I but then in Kotoor II in a time thats earlier he is on Coruscant in the council there. Possibly the leader of the council. Why would Vrook be on Dantooine then? I can think of one reason.
Revan.
You see Vrook was a powerful Jedi Master who obviously knew and trained Revan. Then Revan returned now who are you going to send to train him again, you can not honestly tell me that the council on Dantooine would train somebody like Revan. It would be bullshit. They couldn't possibly pull it off, so what better excuse is there then for the council to go into hiding on the planet that just happens to be the home of Bastila and is going to be the home of Revan. And just happens to have a Star Map. You can't honestly tell me its a good place to hide either because Malak and Revan both knew about the Academy on Dantooine.
So it seems to me that some of the more powerful and wiser masters were send to Dantooine to train Revan there again. Now there could be a million reasons for Kavar not being there, but he simply wasn't.
So what does that tell us about Vrook.
He's wise and powerful, considered good enough to train Revan again even though Revan fell to the Dark Side the first time, and this time its even more important then the first time. He could be the head of the council and if not he's at least second in command. We also know he had a great control over the force (as seen by freezing the Exile) and we know that he was powerful. He does teach the Exile the most powerful of techniques in all games, whether its the most powerful force technique or lightsaber style this guy teaches it. So Vrook had to be powerful, good with a lightsaber and wise.
What do we know about Kavar.
Just a few quotes saying he had more experience in combat then any other Jedi before the Mandelorian wars. That the Mandelorians thought he would be a worthy opponent and that he would fight the Mandelorians. That he was the leader of the Jedi Guardians and that he was a good tactician. We also know he lost from Malak.
Giving us two hard people to judge, but I'm judging in favour of Vrook.
Then you have Dooku and Sidious a duel fought a million times and we always come to the same conclusion both could take it, Dooku has a better chance. And Dooku will this time IMO have help from Vrook. So Dooku and Vrook win.
The Jedi on Dantooine were just in an Enclave. It was an Enclave, not the official Jedi Temple. Oh, and Vandar died on Visas homeplanet when Nihilus Force-Sucked it.