Necrolords afaik from reddit, can pretty much put one companion, maybe two, and the rest filler units and do missions. As a Kyrian, I have to have almost all slots filled with companions and I still have a relatively hard time completing the mission / having a high success rate. Or another take, a reddit person was complaining about having a hard time completing the mount mission for their ardenweald table. The mount mission was in the 50's? 60? And they were still in their 30's. My companions as a Kyrian are in their mid 30's and have a rough time on level 31 missions.
The tables were supposedly tested with companions at max level and "they all performed relatively equal to each other" for reference. Nevermind that leveling up the tables is wildly unbalanced and a slog for Kyrian.
Necrolords also get the 500 anima WQ's and subjectively, better looking cosmetics.