Testing out heels on human dance mat

I love thinking of fun new ways to torment my frail slave. Tonight, I'm making him come out with me to be my human dance mat at the club. I'm literally going to grind my heels into his body while he lies on the filthy club floor just so my shoes don't get dirty. That is his role as my slave. He will have to clean my shoes afterward anyway, so the better of a trample slave he is, the less cleaning he will need to do. Anyway, I have 5 pairs of heels to test out on my slave. I want to choose one that is the most comfortable for me but still able to dish out significant punishment to break my slave with. I start with a red pair with ridges on them that really grind into my slave's gut and chest. Next, I put on a pink pair with a rather sharp heels. This trample gets cut early because the slave can't take the sharp heel on his weak chest. Then, I use a glittery pink pair that compresses the slave nicely while minimizing his complaining.