I've killed a few with Magnus stinger 4 blades and a few with magnus 2's. All but one shot were pass throughs with 535 gr arrows from a 54lb bow. I hit heavy bone twice with the magnus 2 and the tip curled and bounced off the animal. I don't think there is a broadhead on the planet that will go through heavy bone, the thin part of the scapula yes, the heavy section no.
I've done quite a bit of testing with fresh cow shoulder blades, I love to tinker, and have found that skinny shafts out penetrate regular shafts by 2 to 1. The broadhead ferrule must be larger than the shaft diameter. 2 blades and single bevels out penetrate most 3 blades, Nap Razorcaps excluded, it has a very large ferrule... to bad it is discontinued. The wide Simmons was comparable to a regular, not razorcap, 3 blade.
Based on what I found during my cow shoulder tests, I would go with an 1 1/8" wide head, a skinny shaft, and a head with a blade thickness of at least .050 with a hardness of 52 to 54 rockwell.