To start off, I am 19, 5 foot 9 and 150lbs. 10-12% body fat. I have been lifting for a year and a few months now. I started off the journey 128lbs and about 16% body fat.... Absolutely ZERO muscle. My squat is 255lbs for 5 reps (started at 115 for 5 reps), bench max is 185 (awful I know), and deadlift max is completely unknown to doing sets of 10 constantly. My last routine was a 4 day split from muscle & strength. I have run it for 6 months and need a change. I really prefer a 4 day split.... Any recommendations?