One thing you didn't mention is Geirs, Nastrond, Wyrm getting increased dmg the further the target from you. That makes DRG a range job and only going in melee for with High-Jump for a kill and then elusive away. Never position DRG as a frontline.
It's possible to jump in and Roar, by very risky.
Full potency Geirs+Nastrond+Wyrm against a group can wipe them out.