Keep doing what you're doing. You are not a "mana sink". Healers are gonna spam you whether or not you have an extra 3% avoidance at the cost of a huge amount of EH. You are making their lives easy by making AD have a huge range, stacking hp and armor, and playing correctly.
That said, spec out of divinity, into crusade, and swap your glove enchant for EH. It will make you a better tank (more EH and more threat). Also, look into a replacement for blade ward, IMO. Blood draining will do more to keep you alive.