MR out of YYZ - Advice?

I hope no one minds me reaching out here but some of the FTers have a pretty good handle on the "system" and I was hoping you'd help me out.

I am looking to do a mileage run with a buddy starting late Saturday night May 17 or early Sunday the 18th, returning on the 19th. It doesn't have to be a true mileage run in terms of CPM (I am not that much of a purist) but I would like to maximize the miles (would consider segments too I guess).

Star Alliance, prefereably on AC to the extent possible.

Much appreciated.

FUTBF