One thing id say is that at 47, you have to be very careful about where you focus your resources. First of all it seems like bench is your main goal here and it is extremely extremely difficult even for the hormone loaded teen to substantially increase all of the three big lifts at once. What i would do is keep that 1 month percentage based routine you have and put it with a low volume leg day where u could do something like 2 sets of 6 of squats and a 2 sets of 6-8 for a SLD. The idea here tho is to keep EVERY workout to a low volume and to prevent soreness. On the bench day you can do your bench press and mix and match it with your choice of some pulling exercise like a row or pull down etc. But like I said id keep everything as short and simple as possible