Shadowhearts 'chain mail' is the 'Dark Justiciar Half Plate'. Raphaels armor is the 'Helldusk Armor'. Neither of those were missed. The reason the rings and cloak were not mentioned is because they can be worn regardless of what armor you're wearing, and thus they don't represent options which provide superior AC to the 'basic' +2s the OP was indicating, since they can be worn with those.
Also though a character with an AC of 30 can *absolutely* be hit with many attacks - for example, if paralyzed, *all* attacks will hit. Or they can have a fireball dropped on them, or other effects reliant on save DCs rather than attack rolls. Or effects like Magic Missile and Spike Growth that simply auto-hit and don't need an attack roll at all. And so forth. Attack Rolls are not the only way to inflict damage on a character.
