So I'm looking at the new Shield Mastery feat (check out the Lama release info) and trying to decide which feat to drop to pick this up on my Defender of Siberys AC threat tank.

Basically, I'm choosing between Dodge and the Fighter Past Life.

They both provide +1 AC, though Dodge will do so all of the time, while the FPL is dependent upon my Dex bonuses and gear. Dodge is kind of future-proofed as its bonus isn't subject to changing equipment. The FPL, though, gives me 3 clickies of +4 attack per rest, which have come in handy against some of the very high AC targets in epic content (djinns on the VoN 6 bases and the Abishai Devastator). I hope to eventually acquire an ESoS, which should take care of that issue with its additional +4 to-hit over my other weapons, but I don't know when that will come.