i was just if grievous managed to defeat jedi just with his blade skills, and allot of jedi only survived him because the could use the force, if he had it himself wouldn't he be unbeatable.

If he had the force then his cybernetics would weaken his link to the force, in short he would be able to use the sabers a bit better (maybe, hard wired tactics would be hard to alter), but he wouldn't be able do do much with it directly, no force pushes or force lightning I'm afraid.

He would still be able to use The Force to full effect, just not able to use Force Lighting. Though anyway...if he did have The Force, he would be quite the opponent however by no means unbeatable because eventually someone would be able to.

He's a brainwashed gut bucket, the force ain't gonna help him.