I like a fixed blade broadhead too! I was a big muzzy and thunderhead fan,but.... they started giving me trouble flying like a field point i shoot a pse dream season evo i am 15 years old 135lbs and pull 55lbs not a very big feller haha... but i want somthing with a chisel tip to bust bone i have heard ramcats,slicktrick,montecs ,but i have been looking at shuttle T locks you know anything about them? And Thanks for the welcome.
As 102 correctly pointed out, busting bone and archery should never be combined, even in the same sentence--we slice, we don't smash.
I would stay away from the shoulder, especially mid to high shoulder and concentrate low in the pocket/crease behind it. Of the heads you listed, Montecs and SlickTricks would be my choice and they will get through rib bones just fine--just remember....aim small, miss small. I would stay as far away from mechanicals as i could with your low weight and light arrow--numerous low energy problems there.