It took a while to sort out different groups just because the majority were my children and like I figured, they all wanted to be with me, well I tested them by having them group up into teams of 4 and them challenge me or Sondar.
(I did it this way as a dual test, 1 for me, and 1 for Sondar.) I would fight them half heartedly for 5 minutes and for every 4 it seemed like atleast 2 were unfit or lacked the current strength to be a part of my team. But I told them afterwards that they still showed promise to be a part of the guard squad.
I made sure beforehand that Sondar was cool with this test in replacement of what he had planned and he agreed since he was just going to do the same. He was happy that I volunteered to fight because he was a bit worried about fighting my kids even though he made leaps and bounds in terms of power.