I have almost finished my combo Brago edh. It's all etb fun until I get a strionic resonator, then I have a lot of cheap wincons. All I fear is extremely aggro decks that might make me block things and get my creatures killed if I don't have the thopter makers in play. I have been thinking Propaganda and Ghostly Prison, but that might be a little overkill.
Also I have a trash Maraxus commander made of random cards that managed to win my first EDH game. It was fun, another played copied Maraxus, and I wasn't a threat until I swinged a 20/20 maraxus after making all his creatures unable to block me, the other player forfeited because Maraxus had shroud and I had a couple of decent blockers.
Also, they learnt to hate Heckling Fiends.