To be more precise, I'd suggest to take only HP/pdef, as this chronicle made all (almost) feoh reroll to archers, so the main damage you'll face is physical (dagger/archer). Your armor mastery already (plus the robe itself) gives you a nice amount of mdef. (and btw, 10kk to reset AP, so not really expensive to try out different setup to see what fills your needs the most)