Hey,
I've just checked your last changes (up to rev. 8 ). I've noticed that you removed your full protection package for your commader. I don't think that's a wise idea.
Swiftfoot Boots and
Darksteel Plate are (at least for me) the minimum. Since you rely heavy on your commander (because of the +2 damage per ping) 1-2 additional cards would be very useful here.
In it's current state, kill Trobran and your deck is WAY less
dangerous.
Another thing I've just noticed is that your deck is very efficient with creature removal, it lacks artifact removal.
Abrade and
Reckless Air Strike would fit very good in your deck since they are dual use.
By Force,
Smelt or
Vandalblast would be more interesting options, if you think you'll need them (this depends alot on the amount of reelevant artifacts in your playgroup).