A lot of us from XI tend to use the terms "AF" and "AF2" due to the way the gear is named. For Summoner, AF is the Evoker's set (the quested set), AF2 is the Summoner's set (what we get for Myth books). If and when a 3rd set of JSE is released, we'd likely call it "AF3" as we did the Empyrean armor in Abyssea (Caller's Attire, to extend my example).