What is the highest AC you can possibly have under the SRD rules?

[Deset Gled]

AC 96.

Add in either Mobility on an AoO, or cover for any other attack, for an additional +4.

 

[moritheil]

Though I'm not really sure I want the flame-filled past to rear its ugly head, I suppose I should make Inf's comment something more than an in-joke. There may be some useful tricks in that thread, if you don't mind sifting through the attacks.

Consider yourselves warned about the flames in advance .

 

[Mistwell]

Still no alter self spell? Still no polymorph spell? Come on guys, the spells are SRD, and the monsters are SRD, and natural ACs can get really high!

 

[gnfnrf]

OK, my first pass is a Svirfneblin Monk 1/Fighter 6/Duelist 10

Stats

STR 10
DEX 34 (18 base +2 racial +5 inherent +6 enhancement +3 level)
CON 10
INT 30 (18 base +5 inherent +6 enhancement +1 level)
WIS 32 (18 base +2 racial +5 inherent +6 enhancement +1 level)
CHA 10

Feats: Dodge, Mobility, Wild Talent, Psionic Dodge, Combat Expertise, others

AC and modifiers (no spells, no conditions):
10
+10 Int (Canny Defense)
+11 Wis (Monk AC)
+1 monk (Monk's Belt)
+12 Dex (Dex)
+1 size (Small)
+4 dodge (svirfneblin)
+8 armor (bracers of armor)
+5 natural armor enhancement (Amulet of NA)
+5 deflection (Ring of Prot)
+1 insight (ioun stone)

AC 68

With conditions
+1 dodge (Dodge feat)
+1 dodge (Psionic Dodge feat)
+3 dodge (fighting defensively)
+10 dodge (elaborate parry)
+4 dodge (mobility)
+4 dodge (improved mobility)
+5 (defending weapon)
+4 cover (cover)

AC 100

With spells (cast from scrolls using UMD)
+1 size (reduce person)
+1 dex (reduce person)
+1 dodge (haste)
+4 shield (shield)
+[1]2 insight (foresight, doesn't stack with ioun stone)

AC 108

Or, by shapechanging via 20th level scroll into a balor

Dex mod becomes +10
Natural Armor +19
size changes from +2 to -1
Lose +1 dex bonus from reduce person

AC 121

--
gnfnrf

 

[Infiniti2000]

BTW, I can increase that by TWO more.

And I can reduce it by 10 more by pointing out that a monk's belt doesn't do what you think it does. Oh wait, that's a different thread.

 

[moritheil]

Still no alter self spell? Still no polymorph spell? Come on guys, the spells are SRD, and the monsters are SRD, and natural ACs can get really high!

I suspect that most of us who use alter self/polymorph have long since forgotten what the good choices are within SRD limits.

 

[StevenNeiman]

Human Psychic Warrior 19 Duelist 1
Stats: Point buy for 18 Wis (+4 Wis) and 12 Int (+1 Int), which is the only stat you need for this
relevant Powers: Force Screen(+8 Shield), Compression (+2 size, +2 Dex), Inertial Armor (+13 armor), Thicken Skin (+7 enhancement to natural)
Relevant items: 2x +5 Defending kama (2x +5 typeless), Gloves of Dexterity +6 (+3 enhancement to Dex), Periapt of Wisdom +6 (+3 enhancement to Wis), Monk's Belt (+1, and allows Wisdom to AC)
Relevant Feats: Dodge (+1 dodge), Combat Expertise (+5 dodge), Superior Expertise (+9 dodge)
Relevant external buffs: Haste (+1 dodge), Shield of Faith (+5 Deflection), Polymorph:stone giant(+11 natural, +2 Dex, -1 Size), 2x Magic Vestments on inertial armor and force screen (2x +5 Enhancement to armor rating)
Situational advantages: Improved cover (+8 cover)
Total AC: 109
I could probably do better if I spent more time thinking about it.