I think Magi and Joseph carried out the hit but I don't think they planned it or put the plot together. For them it was probably just a job with promises to advance themselves or something but those guys are not seen around Montreal anymore. They even shot at Magi's wife while she was driving a couple of blocks from his home. The arcuris went running. Di Maulo is dead as is Montagna. Desjardins is back in jail so yeah it looks you're right about it being pretty easy for Rizzuto right now. He still isn't done though, I'm predicting more blood shed before the dust settles.