Pull ups/assisted pull ups, some row variation I like doing cable rows and barbell bent over rows in the same workout, and lat pulldown but do it with an underhand grip and close grip(ik it works your biceps but I find it also works back a little and is good as a finisher)

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T-bar or some other row with your elbows flared and a lat pulldown for 2-3 sets each twice a week are honestly all you need to build a decent back

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