Next comes the Western Church, Jade Void Palace, Green Jade Palace, and the Heavenly Court.
Without a Saint sitting in the Holy Mother Primordial Monarch lineage, they would probably be considered to be in the fourth tier.
As for the Purple Haze Palace, it's the territory of the Cultivation Path Ancestor, there's not much to discuss.
The Empress Nuwa's Palace is the cultivation ground of Empress Nuwa, and the Eight Scenery Palace belongs to Saint Taiqing. Both of these have few disciples, and rarity makes them precious. By clinging to these two, one could walk with their heads held high in the Primordial Immortal Realm.
It's true that the Western Church, Jade Void Palace, and Green Jade Palace are all forces that have a Saint at their helm, but there are far too many disciples under these Saints, so belonging to these organizations isn't as prestigious as being a disciple of Empress Nuwa's Palace or the Eight Scenery Palace.