Highest AC

[SlagMortar]

Use duelist PrC from DMG. Put the money from your full plate into an intelligence stat enhancer, dex enhancer, and bracers of armor.

 

[KarinsDad]

He said core, so no Marshal.

If no Marshal, then some of the bonuses you listed earlier would not apply either. For example, how can one get a +5 Sacred AC Bonus in core?

 

[Nail]

how can one get a +5 Sacred AC Bonus in core?

No prob.

AC bonus (other)^1

Footnote 1: Such as a luck, insight, sacred, or profane bonus.

 

[3d6]

The non-dragon CR 20 monsters are the pit fiend, balor, and tarrasque, which have a +30, +33, and +57 attack bonus. That's not very hard to defend against. Your initial build means that the fiends need a natural 20 to hit you, and the tarrasque is not supposed to ever get an attack roll against you (it can't fly and doesn't have a ranged attack).

I'm not really seeing the problem.

 

[Deset Gled]

Hmm... Another interesting thing popped into my mind. Lets say there are lots of bad dudes with bows shooting me and I'm not close enough to attack any of them, can I attack, say, my invisible wizard friend, or even the nearby tree, to gain the bonuses of fighting defensively and combat experties against those archers?

If you think that there is a possibility that there is an invisible foe nearby, you can just attack an empty square. Attacking objects also works.

Another one nobody has mentioned yet: Mobility. +4 AC against AoOs due to movement.

 

[KarinsDad]

No prob.

Ah, but then Prestige Classes have rules for building them as well. One could build a Marshal via core.

 

[kolikeos]

I'm not really seeing the problem.

There's no problem, just interested in seeing how high an AC i can get.

 

[seans23]

Sacred bonus +5 AC
Profane bonus +5 AC

I tried to convince my DM that my true neutral cleric should be able to get a magic item that provides both a sacred and profane bonus to AC, but he wouldn't go for it.

 

[Darklone]

Wasn't there a 200+ AC build on the wiz boards?

Edit: Including Mobility and Duelist with fighting defensively.

 

[Diomeneus]

theres no need to attack empty spaces or objects to gain the benefits of fighting defensively. Simply take the 'total defense action' at the beginning of your turn (+4 AC, +6 if you have 5 ranks in tumble) and run toward the archers at your leisure