Shaman · talent ability, from Riptide

Riptide

1,676per cast

Rank 3 · level 60 · before talents

Riptide

385 Mana40 yd range

Instant6 sec cooldown

Heals a friendly target for 838 to 922, an additional 953 over 15 sec, and increases the effectiveness of your Chain Heal casts directly on that target by 25%.

Talents that change it, each at full ranks:

Purification +168 Thundering Strikes +41.1 Tidal Mastery +41.1 Mental Quickness +19.6 Ancestral Knowledge +1.3

Averages, counting crits and misses, with a typical weapon and no other gear or buffs, against a target your level. Talents at level 60. Worked out from the game's own data, the same way as the Foresight addon.