there is another, IMO easier way to rotate if the melee dps can't handle swapping targets, or if the other healer can't handle their job. rather than standing on opposite sides and switching, simply have both healers on one side! first healer gets howl, other healer moves to center. at 4 seconds left, other healer moves to side and first healer moves to center. finally, healer who is going to get howl next after jump moves south like usual. doing it this way means:

a) DPS don't have to adjust. searing wind will always be on the one side.
b) there is always a healer in the middle for AOE healing during nails.
c) IMO, it's easier and less confusing/taxing on inexperienced healers than swapping sides every time.