Anyone else Tired about the State of lvl 60 and 70 guns?

Burning Hells aren't too terrible, in my opinion. As you said, they drop from Roids and most Gunslingers train there anyway so it's really not a problem. I found 3~4 when I trained there.

Level 70, however, is a whole 'nother story entirely. But it's the same thing for Brawlers; Beia Crash is a peach.

Unless I didn't see a drop, I never got one from 10 levels of training there on my gunslinger. :[ Luckily I scrolled a good enough lvl 50 gun to not matter.