Nice addition Robert! I've only been to MRP twice but did this one both times. Don't remember it being much of a mantle though, you have a good foot hold on the lip of the roof. Here is how i did it. Start on the two holds and press into the underside of the roof, make a long reach around and over the lip to a good hold up high. establish on the edge of the roof via good foot hold on the lip and stand up. Great problem anyway you do it.
Definitely Joey--that foothold is key! The one person I've seen throw a heel on this problem ended up breaking his ulna and radius by way of his shoulder pushing through thanks to the awkward fall on the rocks below.