It's hard to see a world where this card makes the cut in any format outside of Commander, but the existence of Atraxa, Grand Unifier does make for a world where it's possible Breach sees play in some Standard sideboards
With powerful Locations, like Amber's Tiana's Place or Pride Lands, and dangerous items, like Sapphire's Lucky Dime, you'll want to keep a couple of copies of this card close
Whispersilk Cloaks main drawback is that shroud means you wont be able to equip any other cool weapons to that creature, so be sure to order your equipping effects correctly, or else risk wasting 4 mana to move the Cloak back and forth from one creature to another to finish arming one of them
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Sadly, control decks are some of the worst decks for flipping battles since they usually don't play many creatures, which means the Serra Angel backside is unlikely to show up very often
In theory you could have issues activating both of your first two Fleetwheel Cruisers if you play a third, but how many times can they actually take a hit for five trample damage that you really need to make this play