Well since people only rate characters nowadays how about you start rating some attacks:
-FDKM roar
-Ice devils Zeroth destruction fist
-Nakagami starlight
-Grand chariot
-Empyrean
-White shadow dragon's rough silk
-Sherria's finisher on Dimaria (forgot its name)
-Laxus's nuke against Ajeel (Ik it's featless, but assume that it would have defeated Ajeel just like the very wise August said for the sake of ranking)
-DF Gajeel's finisher on Bradman
-Aqua Metria
-Parfum of Power: Maximum Manliness+Eciture of Darkness:Severing shadow (Ichiya and Freed's combo that took down proxy Wahl)
This is for good guys only and I tried avoiding moves that would be difficult to rank (like red lightning).
Ok Hiro Mashima, wanna tell us some other things that no normal fan has a possibility of knowing?
Lol, why is DBZ being brought into this? Yo Elite, do you watch Super? Cuz trust me, the things you're saying about Goku may be true for Z, but in Super I doubt he and Vegeta make top 10.
Oh this is a good one.
1.) White Shadow's Dragon's Rough Silk-
Assuming this is the same one used on Lacarde (amped by Lacarde's and Rouge's magic) this is easily first, the move took out the 3rd strongest Spirggan and before hand he was only moderately injured, it wasn't like he was badly battered or bruised before the move which means this move done the chunk damage need to put down Lacarde.
2.) DF Gajeel's finisher on Bradman-
The only reason this is above Gray's Zeroth Destruction Fist is purely because it killed Bradman while Gray only incapacitated Invel without killing or knocking him out.
3.) Ice Devil's Zeroth Destruction Fist-
This move itself took out one of the less scrubby Spriggan 12 and while it was used in a barrage I give it the benefit of the doubt over Laxus' nuke and Natsu's roar, I'll say the reasons for this once I get to their part.
4.) Laxus' nuke against Ajeel/ Natsu' FDKM roar-
Laxus' nuke against Ajeel is below Gray's finisher simply because I'm trying to be rational, personally, I think Laxus is stronger than Current Gray but not strong enough to the point where the strongest attack Gray has shown so far is weaker than an attack by a casual Laxus while under the effects of the MBP. While Natsu's move I assume is his Blaze Dragon King Roar being used while in his Blaze Dragon King Mode and not an ordinary roar being used in his Blaze Dragon King Mode? Because if I am mistaken move Natsu and everyone below him down one spot, if I am right this is tied with Laxus' nuke. I personally see the move taking out Ajeel in a similar way his Blaze Dragon King Mode's Blaze Dragon Destructive Fist took out Jacob. While I don't thnk Current Laxus is that much stronger than Current Natsu I think Natsu has more move up his sleeve.
5.) Empyrean-
Only this high because it's Gildart's only named move, it's best feat is taking the Historia version of God Serena who is much weaker than living version of himself. This move's ranking it only this high because it's Gildarts' move and I think Gildarts is hiding stronger moves for later down the line.
6,) Nakagami starlight-
This move took out a moderately injured Ajeel which isn't really as impressive as most of the moves above, it's that simple
7.) Grand Chariot-
While I personally believe this move is above Nakagami Starlight, heck I'd have it push Natsu and Laxus' attack down one spot simply because I don't think Laxus is that much stronger than Jellal to the point a no named attack from a casual and MBP ridden Laxus is stronger than one of Jellal's signature techinques. This attack his here because it took Neinhart and Neinhart from a durability standpoint is most likely the weakest Spirggan, only reason it's above Sherria's move is because of slaying advantage she had.
8.) Sherria's finisher on Dimaria-
Just like Erza's move it took out a Spirggan who was moderately injured but Sherria's magic was super effective against Dimria hence why I put this attack below Erza's because I don't think it'd take out a Spirggan like Ajeel without the handicap Dimaria had against her.
9.) Aqua Metria-
Because Lucy should be able to pack more of a punch than Fried and Ichiya naturally at this point in the story.
10.) Parfum of Power: Maximum Manliness+Eciture of Darkness:Severing shadow-
The move is alrigt but I just hd to give the benfifit of the doubt to Lucy.