Worstgen
Jailer
Other supernovas barely use it except Luffy/Zoro, they are trash at haki.
Blother Fertitta
Can other Supernova even use haki?
Monster Luffy
Yes, they can
Luffy is the mc
Nah Ray was good. Oda just fucked up with Ray talking about basic teaching which took 1 year and a half when we see Luffy learning FS in hours and adv CoA in a few days.
Monster Luffy
20 minutes of G4 can tell you how 'good' Ray was. That dude has the gall to say 'now you are ready for new world'. Luffy is dead as a fighter. Give it up. Luffy used to took burden of others and now he became burden throughout the timeskip. Even learning adv haki won't help because he won't use it when needed. So no point.
Monster Luffy
He didn't even improve or try to find an alternative for G4. Pre Ts Luffy would have found a way by now. He learned FS but that is almost non existent throughout the wano.