Here is a guide to the Plane of Air augs:
There are four NPCs that will create augmentations.
One at the entrance to the zone -> Thrawli
Three after the first island in the hub -> Renegade Castellan, Rebel Stormrider, Revolutionary Phoenix
The three in the hub will need 3 main ingredients plus 1 specialized ingredient depending on slot.
The main ingredients are:
Container of Mist
Petrified Air
Wind Parchment
Renegade Castellan
Arms Slot -> Tighter Arms = Castellan Sleeve + 3 main ingredients
Waist Slot -> Thicker Belt = Castellan Book + 3 main ingredients
Face Slot -> Nicer Face = Castellan Mask + 3 main ingredients
Charm Slot -> Charming Wind = Castellan Symbol + 3 main ingredients
Weapon Damage -> Pointed Blade = Castellan Orb + 3 main ingredients
Weapon Hate -> Brutal Blade = Castellan Eye + 3 main ingredients
Weapon Caster -> Elemental Stone = Castellan Ear + 3 main ingredients
Rebel Stormrider
Feet Slot -> Misty Foot = Stormrider Hand + 3 main ingredients
Hand Slot -> Fiercer Gloves = Stormrider Brain + 3 main ingredients
Leg Slot -> Wind Infused Legs = Stormrider Wing + 3 main ingredients
Wrist Slot -> Fiercer Bracers = Stormrider Flask + 3 main ingredients
Head Slot -> Windy Head = Stormrider Eye + 3 main ingredients
Chest Slot -> Airy Chest = Stormrider Toes + 3 main ingredients
Shoulder Slot -> Stronger Shoulders = Stormrider Heart + 3 main ingredients
Revolutionary Phoenix
Range Slot -> Longer Range = Phoenix Skin + 3 main ingredients
Back Slot -> Warmer Back = Phoenix Blood + 3 main ingredients
Neck Slot -> Strong Neck = Phoenix Tooth + 3 main ingredients
Fighter's Ear -> Warlike Ear = Phoenix Feather + 3 main ingredients
Fighter's Ring -> Warlike Finger = Phoenix Eye + 3 main ingredients
Caster's Ear -> Elemental Ear = Phoenix Rib + 3 main ingredients
Caster's Ring -> Elemental Finger = Phoenix Bone + 3 main ingredients
Thrawli
Caster Slot 4 -> Magic Cookie = 3 X Stinking Robe + Hand of the Queen (ENC MAG WIZ NEC SHM DRU CLR)
2Hander Slot 4 -> The Definition of Power = 3 X Red Essence + Hand of the Queen (BER SHD PAL)
Dual Wield Slot 4 -> Awesome Sharp Stone = 3 X Black Stone + Hand of the Queen (BST ROG BRD MNK RNG WAR)
Priest Slot 30 -> Emblem of Life = 3 X Green Marble + Symbol of Life (SHM DRU CLR)
Caster Slot 30 -> Emblem of Thought = 3 X White Marble + Symbol of Thought (ENC MAG WIZ NEC)
2Hander Slot 30 -> Emblem of Shattering = 3 X Grey Marble + Symbol of Shattering (BER SHD PAL)
Dual Wield Slot 30 -> Emblem of Strength = 3 X Blue Marble + Symbol of Strength (BST ROG BRD MNK RNG WAR)
