Its awesome bro - your back is pre-exausted from the rows and chin/pulldown movements - this really finishes it off - you really feel all of the muscles of the back contract - really focus on squeezing hard at that throw back with your shoulders . . - obviously you wont be moving the same type of weight as if you did at the start but thats not needed 
- Let us know what you think .
I did this for years and highly recommend it. Obv I have never done rack deads nor would I, you need to move the heaviest weight you can. But the best gains I made on my back came from the following routine.
Machine or dumbell pullovers, reverse grip pulldowns on hammer strength or, from time to time, on a pulley station, reverse grip barbell rows, behind the neck pulldowns, deadlifts, hypers. Literally transformed my back over the years.
My reasoning was that midback seems to get hit from everything directly while the lats seem to need some pre-exhaust otherwise they perform more indirectly during rows and deads. In order to really hit my lats doing either exercise, I would pre-exhaust with pullovers (probably my #1 lat building exercise) followed by pulldowns (or pull ups, if you are strong enough) and then move into rows and deads. If I start with rows, I never feel it in my lats. Doing them 3rd I get an intense squeeze. Deadlifts after all of that make my lats burn and ache like no other. Perfect routine IMO. Alternate with overhand rows (barbell only, don't get a damn thing out of db rows) and from time to time add in low pulley rows.
I used to do like a 6 exercise back workout, would take me nearly 2 hours, and my back always responded well.
