Yeah, it's incredibly easy to do. I have tanked and healed the fight many times and whether it's my own WHM or my WHM healer, we are always up there on enmity, particularly for the first few phases. A WHM needs to be aware of their threat and ready to pop shroud, yes, but the biggest thing is... don't bother with Medica 2 until AFTER the heart phase! That is usually the biggest offender when it comes to a healer pulling aggro in the early stages rather than a tank "being bad"
