What "and certainly not Law" compared to Zoro? DR Zoro destroys Law. Stop reaching.
I hear for years Supernovas almost all equal, but featwise everyone show something different.
We have Luffy and Kid over the top, right after them Zoro who gonna show in this arc his full potential and also probably Law(with new powerup).
Then in my opinion Urouge taking the place as one of the strongest because he was able to beat Snack, while xDrake and Hawkins get close to that lvl.
And then we have the upper Supernova with Capone(get stopped easily in his strongest form by a YC4lvl character as Perospero) and probably Killer(probably can change later), I would add Apoo but I still wait for more feats.
I mean imaginen if he get beaten by this attack of Kid, just one strong attack, he would get less hype then the flying six fighters lol...
He would get take out so easily, without any build up, in that case I don´t would even put him to the lvl of the flying six fighters, if he can stand up in next chapter and fight off Kid back and bring him to mid-high diff I would place him higher.