Are there any guidelines for where your AC should be at at particular levels?
My ECL 10 Tiefling 9th level binder has an AC of 30. It doesn't seem particularly high to me, but opponents are struggling to hit me. I think the DM needs to improve his monsters.
Opinions?
My AC consists of 10 +5 armour (+1 mithril shirt) +3 shield (+1 darkwood heavy shield) +1 natural (amulet of natural armour) +3 deflection (ring of protection +3) +2 insight (binder class feature) +6 Dex (starting Dex 14 [32 point buy], +2 racial, +2 enhancement [gloves of Dex], +4 unnamed bonus from vestige [Paimon]) = 30
My ECL 10 Tiefling 9th level binder has an AC of 30. It doesn't seem particularly high to me, but opponents are struggling to hit me. I think the DM needs to improve his monsters.

Opinions?
My AC consists of 10 +5 armour (+1 mithril shirt) +3 shield (+1 darkwood heavy shield) +1 natural (amulet of natural armour) +3 deflection (ring of protection +3) +2 insight (binder class feature) +6 Dex (starting Dex 14 [32 point buy], +2 racial, +2 enhancement [gloves of Dex], +4 unnamed bonus from vestige [Paimon]) = 30