yes i completeting the quest to get the blueprints for the odonata archwing blueprints and already built it and its in my inventory in arsenal now. but i think what i need is a second loadout for my arsenal so i can have more than just default. i beleive i have to rank up my mastery more?
You have to complete the archwing quest - as in do the mission where the liset can't rescue you and you use the archwing to escapte - before you do any other archwing missions.
You do not need to rank up your mastery for anything - currently you can have unlimited archwings and archweapons.