My question is in regards to assistance work on my heavy squat day and heavy bench day. My current routine is 531 like so: Mon - Heavy squat, overhead press (assistance not heavy), barbell rows. The purpose of the overhead press assistance is to increase that as well as some carry over to my shoulders in the bench and the purpose of the BB rows is upper back work. Wed - Squat assistance, Heavy Bench, Good Mornings. The Good mornings are there to improve my hamstrings with the thought that it would help me off the floor in the deadlift and overall in the squat. Friday - Squat assistance, Heavy OHP, Heavy Deadlifts. Self explanatory I believe. My question is would swapping my monday assistance for DB bench and Rows be more beneficial with the idea of improving upper back and shoulders? Would swapping good mornings for another pull movement be beneficial for my deadlift? I mean considering I squat everyday and my assistance squats are essentially triples of my 3x5 week percentages would it be better to change that movement? Any advice is appreciated.