The more guides I read the more confused I am about this. Some say UL = sprint, some say UL on CD, some say UL = hpm and hps loss.
I recently leveled my shaman to try resto and ele again, and I always used it for the sprint and sometimes to buff chain heals BEFORE a mechanic was going to happen.
Napkin math says it adds 30% to CH healing (plus whatever minimal heal UL does), but only adds around 25% to CH mana cost. So HPM gain, eh? Plus the benefit of increased burst healing to instantly stabilize the raid.
It obviously also adds 60% cast time, for only ~30% added healing so you wouldn't rebuff UL before CH after the damage has happened. It's an obvious HPS loss.
Any input? Anything I'm missing?
/edit:
Unrelated question:
With riptide's healing before more frontloaded, with the riptide perk and the optional +1 riptide charge system the value of riptide glyph has waaay dropped, no?