Not sure about now, but in the past, Pic Paradis, in addition to car break-ins, they would block the road for your way down and rob you. Like Pat, I have not heard of anything recent.
You could search on You Tube for hikes on St.Martin. I know I've seen some for David's hole and another for a hidden pool. I believe there's also a hikers group page on facebook that may give you some ideas.
Haven't heard of any cliff diving, but in the French Cul de Sac, there used to be base jumping. We could see them from Orient beach but don't know where the take off place was.
Patty Healing Hands is supposed to be excellent. We have friends who book her multiple times per trip.