Kriton
I love drg to death but I will also say that as you get int the higher levels the job takes a turn for the worst. It is hard at higher levels to pump out the damage to keep up with the rest of the DD's and thats what people expect from a drg. The only combination I saw that caught my eye was a drg/sam who decked himself out with +attk gear and spammed penta thrust. He did decent damage yet didn't pull hate which I thought was a good thing.
Well, this is the 2004 drg strategy, which doesn't much work anymore. SAM is no longer a good sub for DRG except under very specific conditions. And Penta-Thrust isn't really all that awesome anyway. You still should stick with WAR or THF. I personally prefer THF, even with polearm.
Also don't forget Polearm is much better at things like those colibri and flies. Piercing doesn't work as well on other mobs.
Also DRG is very much at the mercy of gear. I eat the best food I can when I bright DRG out, and I'm still stuck borrowing friend's Peacock Charm and Emp. Hairpin.
DRG is my personal favorite job in game, but it's a job you have to know well to be able to do anything with it.