Versions

• Minecraft: 1.18.2
• Forge: 40.1.73
• Vampirism: 1.82.2-1.8.5
• Integrations: 1.82.2-1.7.0-alpha+20220820-2317

1st issue, running command code for loaded.
Vampirism version = null
Evilcraft version = null
CraftTweaker version = null

2nd issue,
using Tough as nails, cold and thirst still affect player.

Install all described mods with latest version for each.

If it suppose to be that way it is fine I can use survive and make a data pack. Just need code to call when player is vampire = true.

Well did final test, null doesn't seem an issue.
But either TAN, or Survive seem to not work correctly with vampirism and integration.