[EDIT: Nevermind. I saw my math error right after posting.]
I have a feeling I am missing something simple here, but here goes...
Let's say I spawn a standard Drider Chief, ResRef: x2_drider005. Feel free to look him up: This is the 4th creature with that name in the Aberations list in the Toolset's standard creature palette.
Stats that seem relevant: He has 6 levels of aberration (primary save: will) and 20 levels of sorcerer (primary save: will). He has WIS 16 and CON 16. He has the Great Fortitude feat (and no other saving throw feats that I am seeing right away). He has INT 15 and 20 ranks of spellcraft, for total spellcraft skill level of 22.
I cast Fear at him. The combat log says that his will save was +24. This makes total sense: +5 (pre-epic drider class) +9 (pre-epic sorcerer class) +3 (epic levels) + 3 (WIS modifier) + 4 (spellcraft) = +24.
I cast Finger of Death at him. The combat log says that his fort save versus death was +18. That's not what I am expecting: +2 (pre-epic drider class) +4 (pre-epic sorcerer class) +3 (epic levels) + 3 (CON modifier) + 4 (spellcraft) +2 (Great Fortitude) = +16 +18. What am I missing here? Why is his fort save +18 rather than +16?
(BTW, the drider chief has cast no buffs on himself.)
Sorry for the long post, as this is likely a simple thing. But, I want to give enough relevant info to answer. Any ideas?