Trust me I use the right setup. But without getting on the rock I get overwhelmed by Thrall. Even with DTM gauntlets Thrall will continue to swipe at you, I've had this happen many many times. And no it's not because I'm breaking the invis. When there are enough enemies some start a swing before you turn invis and follow through and will still kill you. Thrall also stick to you after you then invis like they sense you.