It's the last day of your strength phase, so give this back workout all you've got.
With each row, really feel the contraction. Imagine crushing a grape between your shoulder blades with each and every rep.
Make sure you lean back slightly and push your shoulder blades down and back on each rep of the lat pull-downs. In addition to taking pressure off of your lower back and fully engaging your lats, leaning back at a slight angle further engages your core muscle. That means you're doing ab work without even doing crunches!