For DPS, the DK front bar hasnt changed in a while:

Inferno Staff: Whip, embers, engulfing flames, elemental blockade, inner light, meteor.

For the Back bar, you could defintiely go resto if solo, but for grinding, run a lighting staff. The AOE is nuts. I also run lightning in trials and group stuff.

Eruptuion, Trap, Molten Armaments, FLEX, Inner Light, Standard.

My flex changes depending on what I am doing: SOF on bosses, Inhale (deep breath) on trash, Annulment (shield) for certain hardmode fights.

If you want to go full on Resto staff, then you could make room for Ward and Rapid Regen, but outside VMA, you shouldnt need that. If doing this and grinding, I would replace burning embers with Elemental ring for some AOE.

Basically for AOE fights, Put down Blockade and engulfing flames on your front bar, then put down Eruption and trap on your back bar. Cast inhale, then channel a full lighting attack, inhale, full lighting attack, then reapply buffs as needed. Inhale is a strong heal and make sure you let it go off. With molten armaments, the AOE from your lighting staff is insane (and free to cast).

I would NOT go 7/7 light on any class but a templar healer. Go 5 light/1 medium/1 heavy if you have undaunted maxed, otherwise go 5 light, 2 heavy. Magma shell is a great ultimate if you are really struggling to stay alive.

As for your race, if you like Khajiits, then play one. If you think you wouldn't notice the difference as a Dunmer, however, you are wildly mistaken. Khajiits are certainly better suited for stam builds, but I am guessing you know that.