Trying to build one as well, funny thing is I'm down to 94 packs left, and I still haven't got a Murmillo. lol. Also still have to get the second Laquari. Was lucky enough that the first one and the 'impenetrable attack' were in the top part of the pack.
"Ancient Gear with the right tech is much more reliable in my experience." --> With the right tech in your first hand yes... In my experience, as a GB player, I win 80% against AG decks. The most anoying card is Sergent Electro... That's why a good GB player does not play with WOD, MW or Impenetrable Attack, but with Econ, Etaqua and Anubis.