Take note that the amount that I say are the conservative estimate^^ (they can be really much more)
I'll post only Death cause otherway it would require too much time to write also about my sotrmcasts and Seraphons, excluding also other sub armies that I spoil to make conversion but include goblins, orcs, dwarves, deamons, free people, bretonnia, and so on...
1 Nagash new(to build)
1 Nagash old
4 VL/GK o TG/DZ /Vordrai (they are magnetized so I can swith as I want)
3 Neferata/Arkhan/Mannfred on deead Abyssal (mgnetized)
2 Melkior on Abyssal horror
1 coven throne/mortis engine/bloodseeker palankin (magnetized)
5 Wight kings (converted, on steed and on foot))
30+ vampires (on steed, flying, on foot at least 10 can also become a eprsonalized verion of the blood knights)
1 Khalida
1 Settra
1 liche priest
1 Isabella
1 Vlad
1 Krell
3 necromancer
5 cairn wraiths
3 banshee
1 Varghulf courtier
3 crypht ghast courtiers
1 knight of shouds
1 knight of shrouds on ethereal steed
2 guardian of souls
1 spirit torment
1 Chainghast
1 Lord executioner
4 Morghasts
10 black knights/hexwraiths new ones (magnetized)
70+ black knights (converted)
3-400 skeletons
12 skeleton on chariot
4-500 zombies (normal ones + converted)
9 spirit hosts
8 fell bats
8 bat swarms (converted)
42 grave guards (21+ old ones + 21 converted)
50 ghouls
30 dire wolves (to renew the base)
1 black coach (old one)
1 screaming skull catapult
6 vargheists/horrors/flyers/infernal coutiers/haunter courtiers (magnetized to switch)
1 corpse cart
4 glaiwraith stalkers
5 grimghast reapers
20 chainrasp horde
surely I forgot something