I know this version of riptide is like the wrath one without consuming the tide,
but from a gameplay standpoint I find this will make healing clunky if raid healing, and
for 5 man gameplay you’re just spamming chain heal off from the tank with riptide.
I suggest to change the Riptide healing effect to be a buff on the shaman instead of targeted Riptide, and to change that effect to be on your next Direct healing spells by 15%. This would make the other healing spells benefit from using riptide giving shamans more options and would make the flow better. The hit on the % nerf is needed for this change to happen.