Phyrexian Arena seems similar and at a good power level. It's like you took Bob and Blossom and fused them together!
My experience in modern has shown bob to be fairly mainstream, though. GP top 8s would agree on the competitiveness angle, and if the deck has a low curve and is in black, confidant probably makes it better. Heck, burn splashing for him and bump in the night was all the rage.