DRG should have a special quest called "how to use heavy thrust"

[Phyrosite]

Check their crossclasses. You'll be surprised at how many of them don't have pugilist unlocked, let alone leveled.

I'm in this boat, only just leveling pugilist for IR now and I'm 50 DRG. Should bump MRD a bit more too tbh... However always trying to see what I can be doing better for my rotation to maximize, but I use Heavy Thrust and I see NO reason not to use it.