Wow - this has been discussed many times on this forum.
Generally, if you can’t hit 5 reps on your final week/set (95% set) than you have the wrong TM. There are also bad days but that’s kind of the point of this general guideline. Of course, if you are using a variation with a lot of supplemental work, the TM would be lower.
This is why I introduced the 7th Week Protocol on my forum, this forum and in the new book. Again, this has been discussed on this forum many, many times.
The WHOLE IDEA is using the right TM for the Leader Program and stop using TEMPLATES. Thus you can actually program long term and look at the big picture. Please read the many posts on this very forum which this has been discussed.