This build focuses on Fatecarver as our main source of damage with the help of Banner and Assassination + Aedric Spear passives.
It parses 130K+ dps on trial dummy using the powerful Highland Sentinel + Slivers of the Null Arca sets combination.
In content you can use Highland Sentinel too, but if you can't maintain it's passive, switch to Deadly Strike or Tide-Born Wildstalker.
If you don't have access to Slivers of the Null Arca, you can use Ansuul's Torment, and if you don't have access to any trial set, you can use Deadly Strike and Tide-Born Wildstalker together.
For AoE and trash fights, Sul-Xan's Torment is the best trial set but if you don't have access to that, the next best option would be Ansuul's Torment.
We use Velothi Ur-Mage's Amulet as our mythic because it's the go-to and meta part of sets this patch.
Because Slimecraw was optimized, for head piece, you can use any light 1 piece monster helm that gives critical chance.
The order of using Set distribution across gear pieces is flexible. Adjust according to availability and preference.
Any race is viable for this build but personally I choose Dark Elf because of it's versatility.
You can use Magicka as your base resource. This way High Elf would be the better race option. Also don't forget to change all gear traits to Magicka.