Sidestep Secrets, Nature's Whispers and Canny Defense - How do they work?

[Felix Gaunt]

I am trying to understand if Sidestep\Whispers will stack with Canny Defense, and if Whispers is affected by Armor Max Dex like Sidestep. See below for info on all 3, I bolded what I thought to be the pertinent parts.

I think Yes to Whispers losing AC due to Armor Max Dex, see the last sentence of it.

As for Canny Defense stacking, I would say yes. It's Int added to AC not Dex, therefore I think it should work. I believe the reason they had it add to Dex AC was because they wanted it to be affected by Armor Max Dex, otherwise they would of just made it Dodge AC instead.

Sidestep Secrets:
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.

FAQ entry for Sidestep Secrets:
An oracle of lore with the sidestep secret revelation uses her Dexterity to calculate her CMD since no provision is made in the text to use her Charisma for that statistic. She does, however, lose her Charisma bonus to AC whenever she is flat-footed, since her Charisma modifier is being used in place of her Dexterity modifier.

Nature's Whispers:
You have become so attuned to the whispers of the natural world, from the croaking of frogs to the groaning of great boulders, that your surroundings constantly keep you preternaturally aware of danger. You may add your Charisma modifier, instead of your Dexterity modifier, to your Armor Class and CMD. Any condition that would cause you to lose your Dexterity modifier to your Armor Class instead causes you to lose your Charisma modifier to your Armor Class.

Canny Defense:
When wearing light or no armor and not using a shield, a duelist adds 1 point of Intelligence bonus (if any) per duelist class level to her Dexterity bonus to modify Armor Class while wielding a melee weapon. If a duelist is caught flat-footed or otherwise denied her Dexterity bonus, she also loses this bonus.

[Weirdo]

Looks to me like both Sidestep Secrets and Nature's Whispers are intended to work like so:

When calculating AC (and Reflex saves for Sidestep), replace the words "Dexterity Modifier" with "Charisma Modifier."

All restrictions on Dex mod apply to your Cha mod when used in this way.

Additional AC bonuses such as from Canny Defence or a Monk's AC bonus stack normally, they just stack onto your Cha mod instead of your Dex.

[Drakkiel]

I don't remember where it's at...but there's a FAQ or dev comment on how canny defense works...either way the statement boiled down to it being an extra bonus on top of your dex, so it was not subject to your armor's own max dex