User blog comment:Solchire/Sunspot Tama - Halp/@comment-25064433-20150328035401

The only staple white SIGNI is Valkyrie, Unforgettable Fantasy, with the rest being either Arms (Nyarobu and Merisa, Energe and Arc Energe, possibly Yaekiri for its Life Burst) or Angels (Haniel > Micheal > Valkyrie, Arcgain and Athena). Nyarobu and Energe both allow you to up your downed SIGNI, although Nyarobu requires you to play Get Index, which sadly does become a dead card once you hit 5. It's amazing before then though.

As for Black SIGNI, Poison Fangs aren't particularly useful excluding Ein=Dagger, as the rest are either Vanillas or Iona restricted.

Ancient Weapons can be used with Ancient Surprise or Dead Splash (which can also pull back Arc Energe once you hit 5, and if you somehow have 7 Ener, you can flood the field with Arms. Not particularly useful except against Mayu), and Code Anti Palbek is useful for pulling back whatever you need, such as Valkyries to search for more Guards, Energe which very helpfully ups Palbek with its On-Play effect letting you play it again for something else, and so on. Code Anti Kythera is viable, but having personally tried it, it isn't great to see Servants or cards that I would otherwise have searched for using Get Index end up in the Trash. Aztec and Texahammer (or some level 1 Ancient Weapon) are kind of staples, since Ancient Surprise and Dead Splash are such good ARTS.

Devils have the added benefit of building your trash, especially Belphego, Lustful Sinner. Generally it isn't a good idea to mill your deck too hard, since Ancient Surprise does wreck you if your opponent manages to make you refresh before you hit 5, and Belphego really helps in this regard. Miria, Vermilion Messenger is great once you do hit 5, and has an amazing Life Burst.

At the end of the day, you'll probably end up with some Ancient Weapons primarily, very likely Devils as well, and possible Daggers.

Grave Night is great, but if you can hit 5 somewhat reliably without it, it's better not to run it (can never have too many defensive ARTS, right?). It helps you get Aztec into the trash and fields a Texahammer (basically, its effect is more like "Put a Texahammer from your deck onto the Field, and ensure you can play Ansap Aztec Texahammer the next few turns).