If DRG does in fact get a buff...

[Ihm]

https://www.youtube.com/watch?v=I8DuslkCeUE

Just uploaded a video of what you all ask. With food buff and party buff only, this is what I was able to pull. A potion would make this higher and fights like t8 still potentially can burst higher with trick attack and selene buff at optimal times.

I ask for evidence in equivalent gear on a mnk because the good ones I know cap out at the same dps as me even with 2 i130 gear pcs.

For reference, 3 pcs of i110 crafted seem to add about 30 dps to drg and potions on cd a slight increase.

450 on a 3 minute parse, that's standard for a DRG, nothing special. NIN can do 520+ and MNK 490+. DRG is better though because 450 is higher than 490 and much higher than 520?

Again you misunderstand what I said. NIN has initial burst sure. However, every equivalent geared DRG will burst higher side by side. In my video you can see initial burst up to around 600-650 and thats without a potion.

Looking at the parse you posted, I don't think that your NIN buddy over there is as good of a NIN as you are a DRG.