Originally posted by Syndicate
Because Mace at his peak is around RotS Sidious level and the other 3 added in tip the scales imo.
They didn't tip the scales in RotS. They just have him enough time to sink into vaapad, but weren't an addition on top of that.
If you want to interpret "peak performance" Windu as "immediately immersed in vaapad" Windu, then I would say they stop at Luke.