I have also seen some hype for Abhorrent Oculus, but I don't think it actually fits into Izzet Phoenix because you are already exiling your graveyard with Treasure Cruise
Ruthless Knave: Im a fan of the sacrifice outlets and I like that the Knave doesnt tap to do it, although the 2B is a little pricey
This goes double for the Enchanted version, which depicts an unusually intimidating version of the character well, as intimidating as he can be, which still isn't all that much
Most of your creatures are quite costly to cast out right , with only five of the 21 costing two mana, and the most expensive costing 12 in total, although this cost can be reduced
The Set Mastery System What is Set Mastery
It helps Modular be a bit more viable, which is good because that archetype is hardly ever played and could use a boost