There also was an attack Luffy performed with the Gold attached to his arm which was the Golden Rifle. This attack Ener could not read or even dodge Ener said it himself that it was "So Fast" all he could do was defend. I am saying Lucci can be faster than Ener's mantra to the speed where he can not read him.
Basically you ignore a direct quote from Ener and Luffy! stating that Blades are his weakness.
First of all who said anything about just Logia users being stronger than Ener. Mihawk is one of those monsters that Luffy has seen Shanks is another possibility. Whitebeard is definetly "the strongest" and in my mind has no Devil fruit ability. Any character without a Devil fruit is very possble of defeating Logia users with Raw Talent.
As for Logia users Crcodile is stronger than Ener! For the simple fact that Crcodile was able to defeat Luffy despite having himself covered with Water. Smoker can defeat Ener, Hell Aokiji, Doflamingo, Ace and Dragon. So far that is a pretty big list of powers that are on the seas. Ener simply would not be a high profile player in the seas.
Let's just remember that Lucci can't even touch Eneru even if he was fast enough to counter the mantra.
On the other hand, people like Whitebeard, Shanks, and Mihawk are way beyond the level of Lucci, Whitebeard is the one closest to the Pirate King. I'm not saying you can't defeat Logia with Raw Talent, but Lucci for sure can't. I also stated that people who could possibly beat Eneru that we've encountered so far are less than 10. These are the people I'm talking about.
I'm not ignoring that they said blades are his weakness. What they meant was just that blades were effective against him. They're effective against anyone. It's a weakness in that sense, but only a weakness that brings Luffy to the level of a normal human, nothing more.