OK, this is going to sound obnoxious, but you don't want any pressure on the dolphin striker. It really only holds the end of the pole and acts as a moment for the pole to turn on. I attached mine at the top of the striker right under the beam. I used some nylon hose between the striker pole and the gooseneck and really tightened the screws after I had bent the gooseneck around the pole. That kept it from sliding down the pole.
All of the weight on the pole should be (I'm not an engineer, so I am probably wording this wrong) at the end and directed towards the upper frame through the wire that is attached from the end of the pole to the upper frame. The upper frame being the one out of the water.
I only used mine once and it worked well. The only problem I had was keeping the pole rotated forward because it wanted to go to the back of the boat while I was hanging on it.