Using everything... But your priority, IMO, should be archery sneak shot, conjuration spell OR illusion spell depending on usefuness, shield and sword, then powers and potions or healing if ur dying.
As for a specific class, you can just look for the better builds that describe themselves as overpowered but I definitely suggest a magic-enhanced archery build. Demonhunter is an obvious choice. Keep enemies away from you with staggering shots, slowing poisons, frost magic, and summoned allies.