I went through a stage where I was trying to mix crossfit and sealfit with normal PT. Result: ended up feeling over trained and weak for a couple weeks.
After reading some of the QP's advice about sticking to the basics, I'm mainly just doing Stew Smith's Ranger/SF program for the runs, rucks, and high rep calisthenics involved and spicing it up with rope climbs, burpees, hand stand pushups, etc. Thankyou QP's for the advice regarding simplicity; a lot of these programs seem to involve so much work that there's never really any chance for recovery.