This page gives you a brief overview of the Resotration Druid artifact weapon, G'hanir, with a focus on what paths you should take when starting out. Feedback is appreciated. You can leave comments at the bottom of the page, or tweet @PrestonDvorak.
Your artifact weapon, G'hanir, the Mother Tree, will be the only weapon you use during Legion. While you’ll eventually have all of the traits unlocked, there are a few different paths you can take while starting out. You unlock traits by gaining Artifact Power, which is obtained from doing nearly anything in game including: world quests, dungeons, raids, and PVP. Once you have enough Artifact Power, you must go back to the Dreamgrove (Druid Order Hall) to select your new traits at the Seed of Ages, located to the west of the Circle of Spirits.
Mana Efficiency (Green) | Throughput (Blue) | Utility (Yellow)
I recommend starting with the mana efficiency (green) path. Mana will be much tighter in Legion and this path focuses heavily on reducing the mana cost of spells, increasing the duration of your spells, and even giving you completely free bonus spells from the Power of the Archdruid trait at the end.
With the mana efficiency path done, I recommend going through the throughput (blue) path next. This provides the highest raw healing increase. The Dreamwalker trait at the end even provides additional mana efficiency along with more throughput.
Finally, you can go through the utility (yellow) path, or just fill in traits as you see fit. I recommend getting to the Tranquil Mind trait as quickly as possible. It’s easily the best utility trait on the artifact, eliminating one of the huge drawbacks Tranquility has.
Artifact Relics are primarily used to raise the item level of your artifact weapon. They also provide a bonus rank to any number of artifact traits. You can put relics into your weapon just by Shift+Right-clicking the weapon. Note: if you overwrite a relic with a new one, the old relic is destroyed.
In most cases, you'll want to use the relic that grants your weapon the highest item level increase. If you're picking between two relics of the same item level, you can pick the relic that buffs a trait from one of the paths above that feels most relevant to what you need. You'll likely want to buff your Mana Efficiency early in the expansion, and then Throughput later.
Below are the top traits to consider buffing from each path.
January 17, 2017 - Moved the Macros guide to its own section. Overhauled the Stats and Gearing page for 7.1.5.
January 12, 2017 - Overhauled legendary information and added best in slot legendaries to both BiS lists.
January 10, 2017 - Updated guide for 7.1.5, including adding Nighthold items to Best in Slot lists.
December 2, 2016 - Updated Mastery information to indicate there is no longer a cap on the number of HoTs that can contribute.
November 4, 2016 - Updated enchants to reflect Mark of the Claw proc'ing from heals again. This is now the top enchant for large-group healing.
October 29, 2016 - Updated stat weights based on my new simulations and information in the community. This didn't change much as far as BiS lists.
October 25, 2016 - Updated the guide for 7.1, including small talent/spell tweaks and an update to the Best in Slot list to include Karazhan loot.
October 15, 2016 - Updated stat weights, added Best in Slot list, and expanded the Picking Trinkets section.
October 13, 2016 - Updated some spells and talents with new usage information after having a chance to use them at max level in raid and mythic dungeon situations.
September 19, 2016 - Added actual stat weights to the "Stats and Gearing" page. Also added alternate weights for small-group content.