Mae's standing in the Dream Asura Race was exceptionally high. It didn't sound like a problem for her to be leading troops, but the problem was context.
The strongest existences of the Dream Asura Race were within the Omniscient Sky God Realm. This was the sixth level of the Sky God Realms. To a power like this, one would still be considered a baby even as a World Sea Realm expert.
Logically, the ones that would be leading the armies would have to be, at the very least, in the True Sky God Realm. This would be the proper arrangement that would also maximize the strength output of their families.
They had many True Sky Gods. Even though their numbers were in the billions, even if a single troop was only a million or so individuals, they would still have more True Sky Gods than they knew what to do with. This would still be the case even if the troops were only 100 000 or even 10 000, they would run out of assignments to hand out.