Deatblock doesn't stop Disintegrate.
You can use Deathward for Finger or Energy Drains, and that comes from:
- Visor of the Flesh Render guard (7min DW Clickie)
- Deathward potion from Cleric's Trade in, in Eveningstar (20 min DW)
- Gloomy potion of Death Ward, Mabar turn in (10 min DW)