I'm in a campaign with an Oracle who uses charisma rather than dexterity to calculate AC, and I recently read the Empyreal Sorcerer bloodline, which reads, "You use your Wisdom, rather than your Charisma, to determine all class features and effects relating to your sorcerer class, such as bonus spells per day, maximum spell level you can cast, and the save DCs of your spells." There's also the ever popular Weapon Finesse (DEX for STR on attack rolls), and Dervish Dance (DEX for STR on damage rolls with Scimitar).
What other options exist for substituting one ability score for another?
Feats that let you use DEX in place of STR:
Weapon Finesse
Dervish Dance
Fury's Fall
Agile Maneuvers
Wildblooded bloodline for sorcerers, Sage, substitutes Intelligence for Charisma for their various spellcasting and sorcerous abilities.
Back in 3.5 there were a few feats that let you use a different stat for spellcasting classes, like clerics using intelligence. I think theres a 3PP feat thats very similiar.
There's an Oracle revelation that let's you use Cha for AC I think.
There's an Oracle revelation that let's you use Cha for AC I think.
Lore Oracle, Sidestep Secret.
Sidestep Secret (Su): Your innate understanding of the universe has granted you preternatural reflexes and the uncanny ability to step out of danger at the very last second. Add your Charisma modifier (instead of your Dexterity modifier) to your Armor Class and all Reflex saving throws. Your armor’s maximum Dexterity bonus applies to your Charisma instead of your Dexterity.
The Nature's Whispers revelation from the Nature mystery also allows substitution of Dexterity for Charisma for AC and CMD purposes. (Though not Reflex saves.)