I really feel bad for you because you have to resort to making shit up. I won't bother arguing with you considering the fact that I read the book and there's nothing remotely close to him defeating Kas'im in saber combat, but good try.
He as good as won the first duel, Kas'im even says 'you should have defeated me when you had the chance'.
LOL...He toyed with Dooku both times never wanting to kill him. If you read Dark Rendezvous you'd realize he always wanted to turn him back, but your ignorance is evident.
I go by what I saw in the movie, Dooku fought just as well as Yoda did.
And in the original script he did disarm Sidious, but Lucas wanted to make a completely stalemated fight, so it was a stalemate.
Original script isn't canon, moot point!
And you have absolutely no argument considering the fact that Yoda stalemated the most powerful Sith Lord ever.
By RotS? Sidious was far from the most powerful by RotS, don't be ridiculous.