After reading through the mission, Vexthra and her team concluded that only a few of them should go. They still have the 12th floor and subsequent ones to clear, so they can't waste weeks on a single floor.
Travelling to a different planet will surely take weeks, if not months.
So after some talks, they decided to send a five-member team on this mission. Since the mission said nothing about the strength of their opponent, they decided not to risk it.
Miryssa had already informed everyone that they had encountered natives from the world they are in. From what she revealed, the people of this world have about five Immortal Lords among them and a few others who are already at the Immortal Monarch and Emperor stage.
Such a lineup is enough to go to this planet and rescue their princess. The fact that they haven't already told them their opponent is no simple warlord.
