I have been training for around 10 years and 4 of them have been reasonably serious lol.

I have always followed the body building exercises in the mags (4-5day splits) until recently where I did a 5x5 and gained INSANE strength. I have kinda peaked and went through some old papers I have and found HST. Since I like being strong but I think I need to maintain size through this cut I was wondering what your thoughts were on a 3 day split of HST with HIIT in the form of sprints, and oly lifts? I know HST taxes the CNS quite a bit because of full body workouts every other day, if I add in something like a dynamic clean/pull day I would be taxing it even further.
Does anyone have any experience with running this type of training protocol?