Welcome to Bike Forums. You may want to expand your introduction and tell us about any racing / event plans.
As far as FTP, I would use 90% and set your FTP at 215 watts. Why not? After you do a structured workout, you can decide if the 215 FTP was correct or needs to be corrected up or down. If 215 was too easy, raise it to 220 watts for the next workout and see how that goes. I have found that FTP on any given day varies depending on many factors.
I use FTP as more of a guide versus a limiter. I never want my brain to think it has limitations. Racing is about doing extraordinary things versus taking tests. However, FTP is great for structuring workouts and keeping track of fatigue and of course managing energy when doing time trials. Good luck.