I'm new to this website and couldnt find where you choose which sets to run with. You can choose whatever you want to use. But i would prefer to use: 2 Sellistrix, 5 automaton (jewlery and weapons) and 5 night mothers embrace. You can switch out nightmothers embrace to either quick serpent (for solo content) or willows path (if you want more recovery. Or if you have maelstrom weapons, you can switch your automaton to body pieces and go endurance, agility or vicious ophidian/moondancer.

Any stamina race works. I just chose dark elf because i like them and i can keep my magicka buffs up longer whilst still getting stamina in the passives.

For those who are wondering on where to get the sets, heres a little list.
Quick serpent= Aetherian archive (trial).
Sellistrix= head drops in arx corrinium. Shoulder drops in Glirrions chest.
Automaton= darkshade caverns 1 & 2.
Nightmothers embrase= deshaan.
Willows path= crafted in greenspeakers grove (reapers march), viridan hideaway (bangkorai) and smokefrost vigil (rift).
Vicious ophidian= any craglorn trial.
Moondancer= maw of lorkaj (trial).
Maelstrom weapons= maelstrom arena.
Endurance and agility= Daily random dundegons or vaults in imperial city (cant remember the names of the vaults).