Lost synergy
The four effects Deep Healing (our Mastery), Focused Insight (the talent), Nature's Blessing (the talent) and Unleash Life (the baseline ability) sound as if they affect whatever you do, especially at first glance. Some specifically mention direct heals, some don't, but all in all especially if you are a newcomer you could think that if you cast Unleash Life your next healing spell will heal for more.
Intentional or not, this is not the case!
Specifically, each of them only works for a certain amount of things:
* Healing Wave, Healing Surge and Greater Healing Wave are always affected.
* Deep Healing does not affect:
- Riptide's Heal-over-Time effect
- Earth Shield
- Earthliving Weapon procs
* Focused Insight does not affect:
- Riptide's Heal-over-Time effect
- Earth Shield
- Earthliving Weapon procs
- Healing Rain
* Unleash Life fails to affect:
- Earth Shield
- Earthliving Weapon procs
- Healing Rain
* Earth Shield's +15% buff with Nature's Blessing doesn't bless:
- Earth Shield (hrm... that'd be funky, anyways )
- Earthliving Weapon procs
- Healing Rain
- It affects Riptide HoT, but it only checks the moment it's cast, so retroactively casting ES on a target the HoT is running on does nothing for you
Some of those are rather intuitive, some aren't. Hope it helps you a bit with judging stats and talents. Mind you that none of these make any of the effects inherently weak. The most important thing to take away from this is this:
Mastery affects Healing Rain! Despite what 90% will tell you, it does. Drop yourself to 5% HP, cast it while no one else is around to stand in it, check.