That cannot be true
Shusui was only elevated to its current categorisation because it is black. If it were in the O Wazomono category before being black, it would have been elevated to Saijo O Wazomono. Therefore, the basic sword, unaltered, is inferior to Enma. Enma therefore is clearly an upgrade regardless of it is is black or not; the actual quality of the sword itself is far superior. It. Cut. Kaido. Kaido >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Dragons. This feat is far superior hype. - Oda isn't hyping stuff up for the sake of pointlessness.
Anyway, original point being, Enma is a massive powerup even if we ignore the necessity to train CoA further. Zoro with Enma is still a mystery but you can't say he will be YC1 tier; there's literally zero proof he can even fight YC3s. The end result of their training post skip has Luffy shitting on the other two - G4 would ragdoll both of them, completely. This would probably be true even if Zoro and Sanji tried to fight G4 together. They wouldn't even make a dent on Luffy either. Luffy's CoA is at least as good as Zoros (though probably superior) and his CoO is at least as good as Sanjis (though probably superior). This is still a relevant comparison right at the start of the timeskip too - even in FI, Luffy had superior feats in both types of Haki, without even going into CoC. Luffy was trained in THREE forms of Haki, unlike the other two and even in the types they all trained in, Luffy was superior.
Even with these results, Luffy trained for 6 months less than the other two and achieved superior results (or comparable results because you're too stubborn to accept Zoro is not a god can in fact be second best). The time to achieve must also be taken into account and six months is an enormous positive score for Rayleigh as a teacher.
How can you honestly say, even when Luffy > Zoro's CoA, Luffy > Sanji's CoO AND he has G4, with multiple forms giving him greater dexterity in combat, that Zoro, who has literally DECREASED in durability (see fight with Killer versus his fight with Kuma for comparison) over the timeskip, who literally can BARELY use CoO to a competent level (he was struggling to find and predict Pica's movements), that Zoro had the best training? And why? Because Mihawk allowed for or he himself cut out Zoro's eye? Because Zoro hasn't fought anyone of extreme importance? I rarely use this word, but that is outright R E T A R D E D. Zoro not having fought anyone in full seriousness (though this is questionable, dude fought pretty hard and needed help against Pica) is not a point that serves to prove your opinion. It proves nothing. It only serves as a reminder that there's a lack of evidence that Zoro progressed much at all over the timeskip
I'm not addressing the Enma issue anymore, it's clearly pointless. You cant accept Zoro is getting a powerup. I've seen your logic on threads - ever since Enma became relevant you've been saying Zoro YC1 or whatever as if it is a powerup, but if that's the case why do you still insist Shusui is better? Your logic makes no sense. There's no cohesiveness to your argument. There are no cohesive thoughts that serve the betterment of your points. It's all a scattered mess in your head and you're just regurgitating excuses into the type-box every time you post anything on here. There's no argument to prove Zoro came out of the timeskip better than Luffy at anything - there's the possibility Zoro weakened in some regards all the while Luffy provably (in fact definitely) achieved results much faster and in several extra aspects Zoro isn't even capable of performing outright to begin with (transformation, CoC) as well as all the fields/stats they both can be compared (CoA, CoC, Speed, Durability etc).
Just because Mihawk is what Zoro wants to be doesnt make him a better teacher. Luffy is definitely a shitty student, Zoro is definitely not, and yet, the yield of Rayleigh's training has bared fruit, Zoro's in Luffy's shadow more now than ever before. So when you come around saying Zoro hasn't been that active and he lost his eye, that just signals how BAD a teacher Mihawk actually is compared to Rayleigh. The only way to interpret it positively is if you have an unhealthy obsession with Zoro. I'm sorry mate, but the wank has gone too far this time. It's time you reassess everything.