You have better gear than half the CORs I see.
I guess it just comes down to liking the job. It's my only DD-ish job, so I went balls to the wall with it. 75/80 with no consumables (except cards) when COR/WAR with complete sets for melee, ranged, barrage (on the rare times I /RNG), Quick Draw damage, Quick Draw Light/Dark, convert for Uggy (sometimes I hate my 8/8 MP merits), Slug, Det, lolLeaden, etc.
I'm considering leveling RNG to cap just because they would share so much gear, and it would absolutely destroy my COR for damage so I might not be so hellbent on trying to be the best DD COR evar.