I found ECB black ops to be scarily effective in the first game I played, which was this week. It was against Hordes and we did some things wrong, but not with the action I spammed, I think. Setting up Tearing down the pillars of reality wasn't terribly hard, and it did a lot of damage.
I played the allegience box, minus one unit of warped, plus ecb black ops and a few upgrades on Adeodatos. Can't play 2 commander games until they release more commanders ^^