4k to taunt enemies is unsustainable against anything but single targets and inner fire suffers from multiple problems. The worst imo is the animation, it's barely visible and gets lost In a frantic battle. The high cost means accidentally targeting a trash mobs costs valuable seconds and it frequently has trouble "finding" the enemy hitbox. Considering the other taunt is 1300 stam 4k seems excessive, should be 3k at most.
The taunt animation itself sucks, swirling red is not visible against fire and a ton of other lighting effects. Pretty important to know when aggro is lost visually, something more obvious like mark target would be nice.