Ooooooooooh this might be an idea~ I know you wanted Crowley and Pitch to fight, right? Maybe Pitch does kill Cas (maybe even on accident, like he was going after Gabriel and Cas steps in?) and then I know PR plans for Crowley to go after whoever kills Cas, so they could end up in their fight if that works~ I think Shelly also wants Meg in on revenge, so maybe talk to her also about a clash between Meg and Pitch?

EDIT: Though there's something with Crowley and Kida going on I think but MAYBE WE CAN STILL WORK IT ALL OUT