i have personally flown on top of (next to as well) anks and have tried to have healers res me and neither worked. I clicked the ank when i was right next to it and it wouldn't allow me to res. Something is off about resurrection in relation to being on the carpets. My experience i flew all he way to the ants North or NW of Fel Brit to no avail. As i recall i tried several different locations and nothing would work. I just remember trying all possible locations and possibilities and each failed.