They clearly knew Nolan was stronger than them
Why did they try to 1v1 him?
Why did the steve harvey mf try to 1v2 nolan and mark?
The fight would have been much cleaner and more in their favor had they stayed together the entire time
They spoke so highly of Nolan, they must have known they’d lose any 1v1 against him
They’ve been powering over entire worlds, only needing one or two of themselves to bring entire solar systems to their knees.
They also survived the great purge, seen in s1-8 where the knife-hair woman can be seen. They would most likely have been conquering worlds during the sane time Nolan was relaxing on Earth.
They also most likely believed that Nolan may have grown weak with his newfound sympathies. They would be arrogant because they would all believe themselves equal to or more powerful than Nolan with their experience.
They also don’t know Nolan >!is the true heir to Emperor Argall!<, so it’s not unreasonable for them to not be aware of power.