Yes, and if you compare Daivrat
's text vs table you get another rules SNAFU because according to the text there is really no restriction against divine or psychic casters being Daivrats. Paizo's no stranger to fuck-ups like that tbh. Stalwart Defender
came out in Pathfinder Core and plain forgot to include the AC scaling ability in the table or
provide an explicit progression in the text (standard interpretation is that it scales at levels 1, 4, 7, 10) and they never ever fixed it. Just Paizo things. Paizo would like to send its assurances that it definitely playtests its products though.
You can also add it to spellcasters with Pathfinder Savant
taking Secret of Magical Discipline
feats, just getting a plain scroll of it (or using Daivrat Spell-Fetch, Loremaster, or Limited Wish
) and using Ring of Spell Knowledge II
with UMD to avoid level penalties, or playing a Samsaran
race character with Mystic Past Life.