I was wondering if there might be a class feature or Feat that would switch Will saves from being based on Wisdom to Intelligence… Or even base Reflex saves off of Intelligence?
I seem to remember the latter somewhere, but I can't remember where off hand…
I'm trying to reduce MAD… Even at the expense of Feats, or possibly a few levels of a class/prestige class…
I've Googled to the best of my ability to try and find these answers, but apparently my google-foo isn't that impressive lol
The best resource available for this kind of question is Person_Man’s X Stat to Y Bonus, which includes D&D 3.0, D&D 3.5, and Pathfinder.
For Intelligence-to-Will, I see several options:
Factotum 1st, requires inspiration point, adds Int to any save (or several other things). Factotum is a 3.5e class from Dungeonscape, and uses its own unique “inspiration points” to power its abilities, including the 1st-level cunning insight ability that can add your Intelligence bonus to a saving throw. Inspiration points refresh on a per-encounter basis, so you can use that ability pretty frequently, but you only start with 2. Note that factotum in general is a fantastic class for an Int-heavy character with some levels to spare, but multiclassing is really not worth it for a spellcaster. If you take only one level and want more inspiration points, the Font of Inspiration feat can help you out but be ready to burn several feats on it (the inspiration points it grants grows quadratically with the number of times you take it).
Keen Intellect, Int replaces Wis. This feat from Dragon vol. 3181 is probably what you want. Note that if playing in Rokugan (the setting described in Oriental Adventures), it is restricted to members of the Dragon clan and can only be taken at 1st level. If not playing in Rokugan, DM adaptation of the feat’s Clan property will be necessary. In my experience, the most common “adaptation” is to just waive the Dragon clan restriction and allow the feat to be taken by anyone (it has no other prerequisites), at any level; this has never been problematic that I have seen.
Nightcloak 7th, adds Int to all saves. This prestige class from the Complete Divine web enhancement is decent enough, advancing divine spellcasting on every level, though the prerequisites are awful. The 7th-level grace of the dark feature is generally unavailable earlier than 12th level overall.
All of these are from D&D 3.5e; Pathfinder does not appear to have any options here specifically for Intelligence. Charisma has a number of them, so it is not as though this is something Pathfinder refuses to do so much as something it just hasn’t done yet.