You're gear is likely insufficient. 6k sounds mad low for someone level 53 but I haven't been 53 in about a month so maybe I'm wrong.
Attempt Tomahawk + 2 Overpowers or Tomahawk + Flash + Overpower and you'll likely be fine. If your worried about a dragoon just throw in the heavy swing at the start following the tomahawk. Full Str players roll at 12/13kk health with defiance off at 60...your 7 levels below and have half the health while in defiance. Probably your gear.