Deck:X-Pump

Strategy

 * Unless you can't help it, don't use the X-Bow before you can put down the elixir pump, so you can ensure that if anything goes wrong you cans still have a decent amount of elixir for defense.
 * Until you can put down the elixir pump use the mortar to damage the tower. It costs a lot less and can hit the tower more reliably, so use it to sneak in a shell or two.
 * You can use the other cards in smaller pushes to do some damage to the tower, although this isn't recommended as the deck doesn't have any cards that directly deal with the tower and you will waste elixir.
 * Keep in mind you will almost never get a three crown with this deck. Siege machines were built to stay on your side of the arena, and playing them so they can hit the king tower will just set you up to lose some elixir. If you have already lost two towers, go for the draw.
 * Once you've taken your two crowns you can play your siege machines as a defense, and mighty ones at that. A giant will take constant damage from a defense planted X-Bow, and the mortar can damage tanks and swarms behind them.