You really only need to be a 7th level Necromancer if you're willing to work more than a day on it, 8th if you can wait a short rest, or 9th if you're really impatient.
You can't work more than a day on it because you have to recast animate dead.
2. Animate your dead. If you're a Necromancer Wizard, your Animate Dead targets one additional corpse or pile of bones. That's 2 for a 3rd level slot, 4 for a 4th level slot, 6 for a 5th level slot, etc.
You have the numbers wrong. When you use Undead Thralls "you can target one additional corpse or pile of bones". This is NOT double the number of bones or one additional corpse for every level above 2nd. So RAW it is actually this:
3rd level slot: 2 Skeletons, 1+1 extra for being a necromancer
4th level slot: 3 skeletons, 2 + 1 extra for being a necromancer
5th level slot: 4 skeletons, 3 + 1 extra for being a necromancer
6th level slot: 5 skeletons, 4 + 1 extra for being a necromancer
7th level slot: 6 skeletons, 5 + 1 extra for being a necromancer
8th level slot 7 Skeletons, 6 + 1 extra for being a necromancer
9th level slot 8 Skeletons, 7+ 1 extra for being a necromancer
An easy way to remember is take the spell slot level and subtract 1.
3. Maintain control of your minions. Keeping control of already animated minions is less spell intensive than animating them.
Also you are assuming Skeletons do not get killed and need to be reanimated, because when they do (and with 20hps or so and vulnerability to bludgeoning weapons they most assuredly will at high leveel) you are back to using more slots to keep an Army around.
Even with immortal Skeletons that go up against CR15 enemies and don't die, it is still a heavy tax to pay and makes this character weaker than most other full casters if they have a horde of 18 or so skeletons.
Last edited: