For Zhou Tian, he could tolerate the loss of a small number of Demi-humans, but if it required sacrificing all the Demi-humans to conquer a castle, then even though the gains might be substantial, Zhou Tian would need to consider the pros and cons before taking such action.
Furthermore, does Zhou Tian really depend on the help of those Heavenly Eye Users?
In fact, when it comes to combat, Zhou Tian never relied on his Heavenly Eye Users. Even if one day he did utilize their strength, he would mostly send them to defend a certain location. The reality is, if confronted with a formidable opponent, Zhou Tian mostly relied on his own strength to repel the enemies, and when he was not a match, Zhou Tian didn't think those Heavenly Eye Users would make much of an impact.
