How many offensive lineman should the Saints draft next year?

Just read this, and I'll grant you that it can be awfully subjective, but:
Fuaga started hot in the first few weeks and looked like a bargain for a Saints team that badly needed an offensive tackle. So much has changed since then. The rookie left tackle now ranks 64th out of 67 qualifying tackles in pass block win rate and had the lowest PBWR among tackles in last week's loss to the Broncos.