Defend Much?

Why not try to run a  Faith's Reward to try and protect against board wipes and  Doorkeeper to hit them for some heavy mill as another wincon

Not sure if someone said this already but you have 101 cards not 100 since you exile numot to the command zone at the begging of the game and commander is 100 including the commander/general

Even a  Luminarch Ascension would be a great finale late game just vomiting out angels, maybe with a  Akroma's Memorial.

The perfect colors for this deck would be RUG, you would have a nice combo with Axebane Guardian/ Overgrown Battlement+ Freed from the Real/ Galvanic Alchemist. And just have a whole bunch of other ramp into  Fireball effects. But I do totally understand the accepting a friends challenge and making a deck around a "bad card", and I don't know who you would want to use as a RUG commander, but if you have a whole boat load of spare manna, Riku of Two Reflections would not be a terrible choice.

Bump DC

No  Fog Bank?
 Reverse Damage might help too.