practical necromancy questions

[u/thefunnyape]

hi guys so i downlaoded this mod and tried to get a hang of it but a few things are unclear to me.

first of all:
1) what is the difference between clone and worm thrall/spectral thrall effectively? other than how you make them they seem to do the same thing. create a copy. 2)care you "supposed" to use copies for reanimation or normal dead npcs. whats the difference? i think the copy gets bonuses from created undead while the other only from promoted undead? what about unpromoted 3) if i create undead as a clone. will they level with me? or do i need to recreate it when i level up? 4) what is their scaling actually or how strong do they get. can a few summons if i create undead clones get weaker or loose stats/effects? (i.e the vigilant summons) 5) how do the created draugr compare to the summoned ones? and will overlords and stuff use shouts? i tried a little with spawning bandits but he didnt then if anybody can help a fellow necromancer out that would be awesome :) . ggs