Now, an elementary foray into the advanced concepts of Delve.
Delve as a mechanic depends on the decks ability to quickly and reliably self mill. Cards that self mill effectively stash mana away for a later turn. I've found cards such as Taigam's Schemeing to be better viewed as a green/blue hybrid spell. Unless I'm specifically digging for a silver bullet, I usually dump all of the cards into the graveyard, stashing away six mana for future delve uses. The caveat for this ability though is their monstrously high mana costs. In order to get the most realistic appraisal of Delve, try to liken the card to a card with half the CMC. For this example, lets use the card Treasure Cruise. The potential of having acess to a sorcery speed Ancestral Recall is extremely tempting, and justly so. However, we cannot merely examine these cards in a vacuum. Treasure Cruise requires a whopping 7 cards in the graveyard to entirely negate its colorless aspect of its CMC. Examine the decklist. I've enclude the most efficient sellf milling cards as a baseline, and none of them, with the potential exclusion of Nyx Weaver, add more than 5 cards to the graveyard, requiring at least two self mill cards to be used in order to utilize the maximum potential of of the Delve mechanic for most cards.The two unique cards are Murderous Cut, and Dig Through Time, due to their ability to be fully delved after a single Satyr Wayfinder, or relpenish the graveyard in an equitable manner, in the case of the latter. From a vacuum perspective, Murderous Cut and Dig Through Time are the only two delve cards that are efficient in the terms of the infrastructure used to reduce their price. This alters our perception about playing with the delve mechanic more than anything else. Rather than fully utilize the price-reduction of delve, its more efficient to go half-and-half. Our Tresure Cruise gets demoted from Ancestral Recall to Concentrate. Given that view, our playstyle and deckbuilding should change. Personally, I've been kicking around the old Nighthowler// Nemesis of Mortals Deck, enhanced with Delve. Exile the noncreature spells to pay for the cheap utility offered by cards such as Murderous Cut and Dig Through Time. And Empty the Pits is clearly aninsane end-game card. Mythics excluded from this discussion.

As a preface this deck is one I created out of the contents of my usual Fat Pack, an intro deck, and a what little of Theros Block and M15 I actually have. I'm looking to build this into a deck I can take to tournaments. Delve struck me a s a fun mechanic to play and build around; it presents a deck building challenge with multiple directions to take it. 
For more advanced info, cards in the Sideboard with a "1" in the quantity field are cards I own, and am considering. Cards marked with a "2" are cards I do not own, but would be interested in aquiring.