I run a block periodization scheme and have done so for the past few years with pretty good success, I would defiantly ditch the typical BBer gym bro split. I've also ran 5/3/1 and it was a great program but more so for continuous gains, not exactly what you want if you're in a rush to hit a specific number though it will get you much stronger in the long run. I think block periodization with a full body split would be best as far as strength is concerned, think squat/bench/squat assistance or dead/bench assistance/ dead assistance etc gives you more chances to train the lifts.