These Taoist soldiers, such as the Taiyin Taiyang Sword Dao Soldiers, Thunder Sun Sword Dao Soldiers, and Blood and Flesh Furnace Daoist Soldiers, seem to share a common trait here — they are all Taoist soldiers of the Immortal Sect disciples.
The Upper Realm Immortal Sect disciples have never been solitary figures.
They have an entire administrative system, with alchemy, artifact refining, spiritual plants, governance... a complete Immortal Sect system that ensures when they ascend to the throne of the Strongest, they can smoothly take over the entire Immortal Sect without lacking trustworthy people to rely on.
These Taoist soldiers are not specialized ones.
In fact, many Immortal Sect disciples who do not have decisive roles on the battlefield are incorporated into the Daoist Soldier Formation to face the enemy with its power.
In the war of the Immortal Sect, their subordinates, the Taoist soldiers, are often locked in constant slaughter and battle.