I think it is worth considering (as has been proposed before), that whoever put Victor on the path of black magic, passed out the wolf belts, etc., is a person or group of persons trying to engineer situations which would put Harry into a position to leave the White Council (or get kicked out). This also goes for manipulation of the Red Court. The entire war starting incident at Bianca's can be read as a situation manipulated to force Harry into actions which would get him kicked out of / severed from the White Council.
IMO, most of the antagonists Harry has faced to directly to this point (to include the Red Court in Changes) are more than likely sock puppets for a background player who would like to see Harry unaffiliated or outright hostile to the White Council, and ready for recruitment to their cause.
Also, the bloodline curse in Changes and the heart exploder in SF killed in similar ways, but the ritual in SF was NOT a bloodline curse, it used a thaumaturgic link powered by ritual sex. I don't think it needs to be the same person teaching sells and the Red Court. If two coaches who have never met each other both grew up knowing the rules of football and watching the same games, it is not unlikely they will both draw up similar plays. So I don't know if the connection is necessarily there, other than Arianna getting nudged into action that involved Harry.