go strictly dumbells for months at a time, fuck that flat barbell, i stpped flat for over a year cause of shoulder problems, i was at maybe 430 max with a shirt in power lift meet, started to bodybuild due to shoulders and other joint aches, cames back one day last summer to flat barbell 465 with pause and no shirt, for those who dont know i mean powerlifting shirt,lol, i dont bench nor walk around my gym with out a shirt,lmao
so try that bro, always start off preexhausting chest with flys, then do incline first then flat bot dumbells then lots of cables at various positions and pushups supersetted inbetween the cables right there on the floor, OAK CHEST YOU WILL HAVE ! well maybe,lol but thats what i do