As a 130 drg I have parsed as high as 587 with a ninja. There are other parses a bit higher out there too for t10 as a drg. Without a ninja and being picked for charge you should hold around 530 to 550. So at 120 depending on your weapon, party makeup, and mechanics I would say about 480 to 500 should be the norm. This is also taking into consideration that you use food and str pots.