Im having some issues end game with enmity as a Warrior Tank I didn't have any problems with enimity until arum vale. Now i feel as soon as a healer casts cure 2 I'm chasing the boss spamming tomahawk or overpower. This is my first mmorpg playing as the Tank roll and if anybody has any advice it would be much appreciated.

My current method
I have defiance activated
Opening attack tomahawk to pull> flash and/or overpower> fracture> 3 string attack combo> one or two buffs>then repeat from flash/and or overpower stunning when needed.