behind the neck pulldowns 3 sets
barbell rows 3 sets
machine rows 3 sets
close grip or reverse grip pulldowns 3 sets
You're not doing much for the lower back currently.
Try a two week rotation where you keep most of your current routine, but add a lower back excersise:
Week 1
barbell rows 3 sets
machine rows 3 sets
close grip or reverse grip pulldowns 3 sets
deadlifts 3 sets
Week 2
behind the neck pulldowns 1 set
barbell rows 3 sets
close grip or reverse grip pulldowns 3 sets
Weighted hyper extensions 3 sets