You should split the number of Nyxborn Shieldmate in half and add two Hopeful Eidolon , it will help you to deal with burn decks if you have another way of gaining life.I know that you have an enchantment that gives lifelink already, but if you don't draw any and you have to deal with multiple Blaze , you'll want more Energems (life).While he does have a higher bestow cost, you have 4 Hero of Iroas , you don't have to worry about higher bestow costs!(Hero of Iroas for the win!)

Triton Tactics is a super fun defense trick. when the opponet sees your Fabled Hero and first striked Hero of Iroas tapped its fun to untap and suddenly destroy a few of their attackers ( or at the very least make them tap and then swing for lethal)