I have to be a little more tactical

Magika just enough to cast muffle and stoneflesh. (With stoneflesh my armor rating cap is maxed)
With muffle I can sprint / walk closer without being detected.
Light armor weights nothing allowing faster movement (Perk)
Stamina drain on strike. If sweep hits 3 enemies, it′s 19 stamina x 3 with only stamina of 1 power attack used.
25% instant kill chance.
Master difficulty.
Stamina "only" 200 for sprinting and attacks that I miss (So I lose stamina absorb on attack)
Magika is very low, just to cast the two spells mentioned earlier. I think it′s about 140 magica.
All rest to health.
Skyforge for the lightest 2H weapon possible to allow fastest swings, smallest possible stamina cost with the good stagger chance.
Mages I kill with sprinting power attack. If you just press print and power attack, the enemy cold stagger has no effect once the sprint attack animation has been triggered. So I try to finish battles before they start.
Oh yea, edited, I′m lv 53 on Master
Edit #2 - With muffle, you can sprint closer before they hear you so you can always hit first. No sneak needed.