You want a ski softer than the Prophet 90? Seems easy.
You'll want to find something that is longer than 186 to start, (longer if rockered). Somewhere between 95mm - 115 mm in the waist.
The first thing that came to my mind was the Moment PB&J
101 in the waist. And with your size, you'll easily be able to butter it.
It even has
I'd go with the 188.
Other suggestions I can suggest you look into
Surface One Life
Out of those other 5, I really suggest you look into the YLE. It skis like a park ski, and will still be able to kill it everywhere else