Should be what you buy with frost. Far and away the biggest upgrade for you right now. Only the Gauntlets of the kraken compete but, the belt can be bought now and you can wait and see if the Tier gloves drop from VoA.
As per your dodge trinket...simply put bank it.
Get that from triumph badges it isn't Stam per say but the armor reduces incoming damage by a good chunk and should not be overlooked.