Ramp and amplify. Bastion Garrison in conjunction with amplification can enable the generation of a lot of units, although I'm not sure if it'd be better off in the market. Speaking Circle simply seems to be a good site - I just about always get at least 1 good spell from it for the turn I play it. Martial Efficiency has been really handy - even with no Bastion garrisons in play (but bloody amazing when there is!).
So far I've got to Diamond 3 (at the end of last season) with this deck and I believe it can go further.
Martial Efficiency has been very powerful with a Bastion Garrison in play. Spawning a bunch of 3/2s (at least) at fast speed whilst reducing enemy attack values often leads to victory. I've only been playing this deck in silver and gold so far mind you - not quite diamond YET.