Philly Shell + MMA?

Hey guys, I'm sure this is a popular question among boxers/kickboxers of all types -- I was wondering if anyone actually knows how effective the Philly shell guard is in an MMA fight. I'm aware that it's a hard guard to master, but I just wanted to know if it's usable and its practicability. Also, can it be used in a wider stance, or is the "bladed" aspect what gives it its blocking/counterpunching ability? I'm an outside fighter, and I was considering playing around with the clam a little bit next time I spar. However I'm not so sure how to set up the guard since there aren't really that many tutorials and also because I know it's harder to kickbox with a bladed stance.

A little bit about me:
15 Years Old
Muay Thai/BJJ practitioner (for a few months now)
Southpaw
5'10 with a long reach
150 lbs

Thanks to anyone who takes the time to respond.