The actual combo works slightly differently, so don't just go tossing Splinter Twin on Restoration Angel blindly. Blinking the enchanted Angel will of course make the Twin fall off, so if you have Angel you really need to find Kiki-Jiki in order to go off. There are legitimate reasons to Twin up an Angel, like blinking Wall of Omens or Blade Splicer each turn, but the combo is not one of those reasons.
Blade Splicer and Wall of Omens are a big part of why this deck plays differently than normal Twin decks. They give the deck much more of a board presence and let it play a much more midrange role than the fully combo-oriented UR versions. Add to that the ten removal spells and four Restoration Angels, and you can imagine how aggro decks would have trouble breaking through the waves of Golems, Walls, Angels, Bolts, Paths, and Magma Jets.
There's a little bit of hate in the deck too, with two Blood Moons and two Relic of Progenituses able to randomly hose all sorts of linear decks, like Tron, Melira, Living End, and all sorts of three-color decks.
Ultimately, a tempo version of Splinter Twin did win the tournament, but this offers another interesting alternative to the normal Twin decks, and is especially resistant to Lightning Bolt and early pressure both.
