Luke decades before his prime was already outstripping PoD Bane's best (nexus amped) feats by orders of magnitude (.ie destroying Vader's fortress, being able to tear the hulls off of battlecruisers, etc.). He is also infinitely superior via powerscaling, being more powerful than Palpatine while peak Bane is weaker than Sidious by 30 generations per the RoT.
That is an absolutely monstrous gap, monstrous enough for him to snap all their necks in an instant if he wanted to.