I'm going to make a tank actually, a selfish tank, and just raise their corpses when they die Does that count for healing? (sorry for the irrelevant answer).
I'm very satisfied of the numbers I see on my UESP build.. 50k health, 2k magicka regen. resistance at cap. 18k stamina and magicka. The life goes up to 90k if I use the bone goliath, and a lot of passive self healing and resource return/ult gen.

Khajiit because... I want the kitty Goliath.

for race i went Khajiit for fun, but crit healing doesn't hurt, and the regen/max stats is.. okay. Not breton, but it's okay. I don't do leaderboards anymore anyway.

I'm experimenting with all necro skills, but likely i'll be keeping Resistant Flesh as my BoL/Ward Ally replacement. I'm debating on Expunge and modify, everyone says it's trash but i like that it removes the debuff from resistant flesh and also gives you the sustain, and a self cleanse is very nice, but it's no ritual of retribution. The mender dude is a much have. resurrect ult isn't super useful but it's still gonna be my front bar slot. The rest i'm working out on, but i'll see. I might use that minor invlun totem, the major resistance buff skill, and maybe even bone goliath instead of resurrect just for funsies in overworld or norms. but then why not just use warhorn? meh. the aoe major defense debuffs is also nice for trash groups so the tanks don't have to worry about that as much. forgive me for not remembering the names i've only played necro for 10 hours haha. Also the renewing/enduring undeath is super interesting. a 3 effect cleanse on a group or having a hot stronger than springs is super good and interesting, but it relies on the corpse problem to begin with. Braided tether might be good to back bar to make your heals stronger while you're offbar, and is a nice heal.

As for sets, the usual bingo board: Worm cult, sanctuary, mending, infal, olorime, jorvuld, etc. Now that earthgore got removed, nightflame to replace that or symphony of blades otherwise.

I went Kahjiit

Planning on Olorime/Worm Cult

Haven't decided between Earthgore and Nightflame yet because of the Earthgore nerfs. Once I run a few test trials with Earthgore I'll decide.

Khajiit, with Julianos and Destruction Mastery, since I don't need Healing Staff anymore. I intend to use critical chance to my advantage, critically healing when possible and combining with good damage dealing to a very nice hybrid healer/damage dealer with Destruction Staff. And possibly The Mage as mundus, I think...