In Agrah path 4 the High Priestess of Dwayna, was bugged to forever stay at 50% health, she didnt wait the 45sec before teleporting away and healing, with 5 zerk playes she still wouldnt go below 50%.
We was on average (over 50 tries and even resetting her many times) it took 4-5 seconds to get her to 50% health from after when she teleported away and came back once we gather the elementals.