You could say the same thing about doomsday or maybe even PO.
People have mentioned blue (for force of will) and using Thoughtseize in black. You want to win when its safe and not just throw out your win with no back up.
If your really worried about storm Hope of Ghirapur is a bit better than angel's grace since you can cast it off a ritual.
I think 8-12 protection spells are needed. Blue is nice since you can Plunge for a force if you have a blue card and the combo.
I've been playing around with the idea of using plunge into darkness with berserk and deaths shadow. The idea being if you have death's shadow or berserk in your opener and plunge, you can plunge for 17'ish and get the other, then play the shadow and win the next turn. In gold fishing I get mostly turn 2-3 kills.
If you wiff but already have a death's shadow you can get another and just beat down with 2 death's shadows. You also don't need to go all in on the combo.
Against an aggro deck like shops or dredge either. You can take a few hits and play the shadow then berserk for the win when the time is right.
This is very much a glass canon, and I don't have a list I'm comfortable with. I do think this has potential.
I figured I would throw this out for the public since I haven't had any luck.
Against dredge putting a card back in your hand might not be a bad thing in some board states. Especially since dredge can't deal with lands and once they're out of disruption they're generally spent and all in on their combo. If you can force a board state where no player has any action/graveyard, but you have a companion, then a Luttri could be decent.