Even if the loyalty of these subordinates is a problem, they are high-end combat power!
Not to mention the Seventh Grade Sanctum, just the resurrected Sixth Tier Legendary is an immense foundation.
You know, in the first layer of the Sea of Realms, Seventh Grade Sanctum are essentially the trump cards guarding the base, playing a deterrent role like nuclear weapons. They don't easily engage unless it's a moment of life and death.
So, the apparent guarantee of combat power is the Sixth Tier Legendary's presence.
This is also why the Wild Boar Skin Dynasty was eradicated; lacking a Seventh Grade Sanctum guardian, they were subjected to territorial plunder and schemes by various alien races in the Sea of Realms.
Without a Seventh Grade Sanctum guarding, others can send out Sixth Tier Legends to roam your territory. If they don't bully you, who will they bully?
