Replying to Jeffrey 102 config

About 2 months ago I made a post asking for recommendations about a park ski for someone who's 6'9. I got a lot of feedback

and I've settled on a custom pair of ON3P Jeffrey 102's. For reference I'm 6'9 and I weigh roughly 230lbs, and I ski a 191. I

need input on what layup and stiffness to go with. I need a stiffer ski due to my height and weight, but I've heard from people

that the 102's are already fairly stiff. Will I have to pick the stiffer flex option or should I leave it as is? Also I don't understand

what the purpose of the different layups are, so am I better off keeping stock? Any help would be appreciated. :3