Restorative Waves - If an allied hero is still under the effects of the healing over time of Riptide when Riptide is cast again, slows, and roots are removed from the target.
Astral Recall - Target an ally with your Hearthstone, both of you are returned to the hall of storms in half the time. Only can be cancelled if the user is interrupted. Uses 1 Mana Crystal when also bringing an ally.
Cleanse Spirit - Activate to make target ally Unstoppable and increase movement speed by 20% for 2 seconds. Can be cast on yourself. Uses 2 Mana Crystals. Cooldown: 45 Seconds.
Molten Earth - Increases the area left behind by Lava Burst by 30% and doubles its damage.
Having said that, first I think that his healing rain is way too similar to Malf healing ult. The upgrade is great though.
Second I would increase both ultimates CD's and remove the mana crystals cost.
Third, just by reading the numbers, it would seem that you would run out of mana crystals really fast, and won't be able to restore them as fast. It has to be made and tested, but just by reading it would seem that all crystal regeneration talents would be a must pick, leaving other good talents allways out. I would make it that active talents don't cost any crystals to be cast, or making the crystals refresh a bit faster. Maybe they regenerate faster when you pick a globe/fountain and when you deplete all of them. That could be a tier 1 talent too.
And last, the level 20 talents, they are great, they feel really good. I don't know how much of a must the extre 3 crystals would be, specially if you pick other regen talents. The wellspring could turn around lost tfs and win games (would reduce cd though, specially if it leaves you with no mana). And I would make thunderstorm 20 talent make it heal a bit more maybe.
I hope I'm not striking as a complainer, this are just things I think might hinder the character's gameplay, but I tell you for sure, this is my new main healer and is not even released in ptr yet. What do you think about the things I'd change? Oh and also how would you feel about throwing in some dmg buffing talents so he can have a more dps route?