It all depends on YOU. If u weigh 160lbs and can do twenty pullups do heavy pulldowns instead. Wide grip for width, Close grip/reverse grip for lower lats and middle back thickness.
Heavy tbar rows. Heavy dumbell rows. Heavy reverse grip bb rows. I've always gone with the thought that ur back grows from the middle outwards so I hit a lot of close grip at the start of my session then finish off with wider grip action.