As for spells to flash in, you can do so much with a surprise Narset, Parter of Veils in response to a Brainstorm, an unexpected Elesh Norn, Grand Cenobite when an opponent swings out at you, or a sudden The One Ring when somebody tries to take you out
While there are other weird things you can do with activated abilities on creatures, the bread and butter of the deck will be cards like Will, Scion of Peace for cost reduction, Beacon of Immortality for big mills, and Sphinx of the Revelation to draw a lot of cards
Any future bans are likely to come from this list, save for maybe something that shows up in a new set and immediately causes problems, like Nadu
One of the weaknesses of the deck is that we only have one way to burn our opponent out and thats Munitions from Weapons Manufacturing