I've been playing [something similar since DTK hit. I don't think it'll ever be competitive, but it's solid enough to hold it's own and not get rolled against 'real' decks.
I never got around to putting together a sideboard or updating it for Origins.
I'm surprised you're not running Tymaret though. He does tons of work against removal and adds lots of reach to burn out the last few points of damage. Plays well with Alesha as well.
http://www.neogaf.com/forum/showpost.php?p=157489945&postcount=17103
[EDIT]Looking at your list again, just realized you're in Boros, not Mardu. That explains why you're not running the Burger King.