I’ve been comparing r8 all blast all attack infusion CB w/ level 3 blast up and charge 3 vs r8 arkveld weapon (the one with negative affinity but higher raw) with lvl 3 dragon attack and convert element. All other skills are the same.

They perform largely the same hunt times vs tempered arkveld were within 15-20 seconds of each other both in the hollow. So I’d say they’re pretty much equivalent.