THIS is the one. A working siege deck that mixes the Siege scenario with Idarran, and reinforced ballistas with Aretuza adepts.

Round One: If you have blue coin, Try to Natalis into Kerack Frigate, then crystal skull on the Frigate, which instantly crews it. If it loses one of its neighbouring soldiers, use kerack guard, pikeman or Immortals to reinforce. Then drop the War Elephant inbetween them. for 16 points :O.

This usually gets a pass from my opponents as its big points fast.

Round 2 dry pass.

Round 3 is when we Idarran and siege combo with the aretuza adepts and ballistas. Have the equinox on standby to purify idarran if he gets locked, and bear in mind we only need him for two turns... 3 if we are lucky with using reinforcements on a ballista. Bombardment at this stage offers a hella lot of points, as it gives the ballistas 1 charge as well as dealing big damage.

If you need tall removal try and save Artefact Compression for last card.

Have fun and let me know if it works for ya.