His shuttle feat if you calculate into it how f-ucking far he was from his best, and two shotting Talon who years prior could literally shrug off a shuttle smashed into her face are both pretty good.
But being able to go toe to toe with Krayt in both a force duel and a saber duel is his best.
PS: One could argue Ulic > Cade, but going as far as Cade being a blatant weak link? F-ucking ridiculous.