Overall, the tier set for evoker is very powerful. The 2 set increases the power of spiritbloom by a significant margin. This is what allows a spirit bloom-centric build to be strong. The 4-set is not as impactful for spiritbloom builds, as it gives you more essence bursts which aren’t always needed when casting echo, but it does provide a large increase to emerald blossom builds which rely very heavily on essence bursts to conserve their mana and output high HPS.
There are two trinkets in patch 10.1 that are significantly stronger than any other option: Rashok's Molten Heart & Screaming Black Dragonscale. Both of which can be obtained in the Aberrus raid.
Other trinkets available that can be used are the Ominous Chromatic Essence from the Raid, Spoils of Neltharus from the Neltharus Dungeon, and Rainsong from The Vortex Pinnacle Dungeon.
The class trinket, Neltharion's Call to Chaos, is a bit weaker than the two BiS trinkets, but it is also available to be used.
Ways to Spend Sparks of Shadowflame
Crafted gear is a great way to improve your gear, and you can craft anything you want. However, you will gain the most benefit from a few specific items.
The Adaptive Dracothyst Armguards are a big upgrade and a great option to craft with your spark, and are recommended to be crafted.
Other options include the Undulating Sporecloak or the Venom-Steeped Stompers. The Venom-Steeped Stompers are a HPS upgrade, however, the Undulating Sporecloak is a great item to have for survivability, as it provides you with a very large shield, and can save your life.
If you have any sparks left after crafting your embellishments, crafting items to fill gaps in your gear is recommended.
Weapons provide you the largest increase to your power. While there aren’t any unique ones in patch 10.1, you may want to consider using a spark to craft a new weapon as soon as possible as there is no other item you can get to increase your power as much as a weapon.
Onyx Annulet and Primordial Stones
In the new patch, 10.0.7, a special ring (Onyx Annulet) was added to the game that give powerful bonuses, however, the ring doesn't have secondary stats. This ring is exceptionally powerful and you will be using it in patch 10.1.
If you haven’t acquired it yet, you will want to farm it soon. In general, it will be outperformed by standard rings when you are doing very high HPS (120k+), but any HPS value below this and you should be sticking with the Onyx ring.
The most powerful Primordial Stones combinations for your Onyx Annulet are as follows: