I just brewed a brow n ale based holiday ale, 5 gal batch. Used 1 oz along with a very small amount of cloves, allspice, cinnamon, and a bit of paradise seed. In the keg now, not tapped , but very nice level of spice when sampled.
Previously i used 1 oz bitter and 1 oz sweet in a Saison (5 gal) which was drank very quickly by my brewing crew.