AC Softcaps by Class
Player mitigation AC on TAKP is subject to softcaps. See Calculating Your Mitigation AC for how mitigation AC is calculated. Here are the softcaps for each class. They're taken from the last open TAKP source, which took them in turn from a Mac client decompile.
Warrior: 430
Paladin, shadow knight, cleric, bard: 403
Ranger, shaman: 375
Druid, beastlord, rogue, necromancer, wizard, magician, enchanter: 350
Monk: 315
Notes:
1. Shields directly increase AC softcaps. A knight with a 55 AC shield, for example, has an AC softcap of 458. A wizard with a 35 AC shield has a softcap of 385.
2. These numbers do not include AAs. The Combat Stability / Innate Defense line of AAs will (in Luclin / PoP) introduce softcap multipliers. The maximum multiplier on TAKP will be 127%, giving a max-AA warrior a softcap of 546.