Casey sez:


APL 4 final fight lists 3 Ghouls with 26 hit points and the Mummy.
The mod lists the correct MM page, so it was written in 3.5, but
ghouls only get 13 hit points (2d12), while 3.0 ghasts got 26 hit
points (no Toughness feat, I believe).

3 Ghasts would be EL 6 + Mummy CR 5 + 1 Circumstance for Prot Energy
(fire) and Unhallow up would be EL 8, imo. Seems it should be 3
Ghouls CR 1 + Mummy 5 + 1 Circumstance for spells up = EL 6-7.