According to his own request, Sterl only asked for a team of ten people, including Diana and Morette. Most of these ten were individuals he had saved, and they were deeply grateful, obedient, and even idolized him. The others, though they might have some dissatisfaction in their hearts, were still compelled by their strength and the principle of the majority, so they also followed his orders without question.
In addition, the remaining twenty or so gods were all led by Eterna. At first, Eterna didn't fully understand the reasoning behind this arrangement, but since it was Sterl's own request, she didn't dare oppose it.
Moreover, for Sterl, this was actually a good thing. The more people leading the team, the less likely they would encounter danger. He still had some concerns about the Shielding Power of forces like Ashen's, even though he wielded two Sword of Doomsday Judgment. No one could be sure if the enemy had some hidden trump card.