If you are not purely interested in developing high pull strength then no, also, for technique fewer sessions should be enough.
If you are interested in developing maximum high pull power you should do the move at least 4 times a week with max. 2 other movements (that have only a little impact on your recovery ability)
Upper back can take one hell of a beating without you getting overtrained, I have trained back for 4-5 times a week in the past with great results. I would suggest doing grip work maximum of twice per week, as it takes longer to recover from it. (use straps for your rows if you are going to do also grip- specific work, if not, ramp up to a max set without straps and then throw the straps on. Also, use a belt)
Scott Abel has some great metabolic circuits
For example, the quad blast: (no weights needed)
12 alternating lunges per leg
12 alternating jump lunges per leg
15 jump squats
also, consider checking out some crossfit wods, you might find something similar there.
Take your current max reps with your bodyweight
Say, you can do 10 chinups
Divide that by two, you get 5
Now, perform 10 sets of 5 for the chinup 2-3 times a week (some people may go up to 4 times per week) and try to add a rep to each set every time you train.
so session one may be 10x5
session two 10x6
session three 5x7, 5x6
and so on.
When it is impossible to do more reps in those ten sets, reduce the amount of sets to seven and continue adding reps.
You must not get fewer reps than last time, ever. Even if the last two reps look a bit ugly, do them.
If you can do 35 ugly chinups, you sure as hell can do 15 clean ones. (If not, your understanding of ugly reps is something totally different than mine)
1 Front squat:
Paused front squat
1 1/4 front squat
For both of these, stay under 6 reps, you can occasionally go to 8 reps. (If you have a harness I'm terribly jealous and would suggest also sets over 10 reps)
Paused back squat
Again, under 6 reps
Snatch - grip deadlift
Under six reps, again
High incline press with dumbbells or barbell
Surprise, under six reps
Band pull - apart
Set - wise go with what suits your current goal, if you are building strength go with 3-5 sets, if you are tapering in order to test your strength go with 1-2 sets
Red meat and vegetables from the food box your are carrying with you
Fish oil, intra-workout carbs and amino acids
According to mr. Poliquin, reverse hypers make you sprint faster. Supplement with squats, deadlifts and actual sprinting.