Okay, so let me preface this by saying that obviously this deck isn't really even remotely cheap to build, sorry budget oriented players, this one is going to take a while to grind the Shiftstone for. It plays a stupid amount of Legendary stuff and unfortunately there just aren't great substitutions for most of these cards, cards like Diogo, Ijin and Siraf are incredibly unique in that they're early drop creatures with powerful late game utility, meaning that unlike most midrangey ramp decks that are forced to keep topdecking the top end of their curve, you can continue to apply adequate pressure even while bricking completely on your draw step and finding tons of extra power off the top instead of actual dudes. The top end legendary guys aren't easy to replace either, Reality Warden is a gigantic undercosted threat being a 7/7 for 5 and it totally shuts down Haunting Scream decks until they can manage to kill it. Heart of the Vault is an incredible midrange value card, getting to cast him off the top of your deck is fantastic, he cantrips when he ETBs and his ping effect can help pop aegis's, pick off small dudes, or scale up Torch & Purify to actually take down larger units or ones that tried to value block you. Darude Sandstorm and Behemoth shouldn't need much explanation as they're some of the most powerful mono time units in the game and while they might not like getting smacked around with Hideout Pistol, they're stellar units at clogging up the ground and helping you push ahead when they do actually get to stick to the board.
If you're looking for a resilient Midrange deck that gets to play some of the most powerful stand alone units in the game and can spare the shiftstone this deck is a solid choice against most of the field except token flood rally decks, those are a nightmare, just dodge those ;)