What's Interesting is that Goro Goro No Mi was First "Invincible" DF Introduced in Story,
It was followed by Hie Hie No Mi...
It is a Coincidence that Oda wanted to use same Order again?
After Kuzan's DF, it was Yami Yami No Mi, followed by Kizaru's DF, followed by Magellan's, then We got WB's & Akainu's,
Then in Post-TS, We got Issho's DF, followed by Big Mom's, followed by Aramaki's,
These are DFs Revealed so far that are of Highest Level, Invincible similar to Enel's and Worthy of Admiral/Yonko Type Leaders,
Rest are Mythical Zoans which obviously aren't gonna be Part of Ragnir Power,
If We exclude also Big Mom's DF since it's "Control" Type rather than "Produce" Type, then We are Left with Nine Invincible DFs,
Same as Nine Realms...
People might think this makes Ragnir very Broken, but I think it fits because imo Ragnir is Ultimate Shipwright Tool,
It was Used to Forge The World itself, which is like a Ship itself similar to how Thriller Bark was revealed to be a Ship,
I think Ragnir having such Powers indicates that OP Planet is Man-Made.