I like to mix it up as far as back training methods.
Right now I have back broken up into two days,
a width (vertical movements) and thickness (horizontal pulls) day, and am enjoying it.
On each of the days, I have at least one heavy movement (yates rows and neutral pulldowns currently)
where I just focus on moving weight, then have at least one movement each day where I go a little lighter and hold the weight at contraction (seated rows and 1 armed stretchers)
Back is one of the muscle groups where MMC is most important, IMO. If you need to develop it, holding weights at contraction and going for a pump can be a good way to do so.
I AM still using a 8-12 rep range on almost all back movements though, despite focus on moving weight.