I think how you spec depends heavily on what you want to lean into as a fantasy.
If you just want undead armies and don't care about getting up close and personal, wizard would be better imho. It gets better undead options and has the thematic ability to heal on kill.
If you're going for a "death knight" then a war cleric summoning undead then using dark spirit guardians and wading in would satisfy that nicely.
So you have 2 options really. And both honestly can function well as a pure class build. Because animating undead is linked to spells and you won't really get that til level 5, you're better off sticking pure until at least level 5 then *maybe* respeccing or dipping at level 6 to get proficiencies or whatever.
Ironically cleric 1 is an insanely good dip for wizard because of all the proficiencies you get, as well as no loss of slot progression. So if you go wizard, I'd play straight for 6 levels then at level 6 or 7 respec so your first level is cleric and then the rest in wizard. Cleric I'd play it straight cleric.
Edit: One more thing. If you go for melee death knight with spirit guardians, a single dip in fighter at level 6(respec so you start as fighter) will give you con save proficiency and then you can warcaster at cleric 4. This is especially useful for spirit guardians since you may opt to run between enemies eating opportunity attacks if you're going death blender. But either way your concentration checks will be amazing.
Last edited by Garresh; 22/10/23 05:05 PM.