Alros nodded, despite no one physically there with him.
"My God, will they become stronger than me should they defeat an S-rank Monster without my help?"
[ It depends on the number of people involved. Despite you sending in most of your clones and other Monsters to die, in the end, you did the killing blow while surviving a fight against the Hero herself. The Monsters that follow you is the same, with the 6 that actually manage to hurt the Hero, no matter how little, and survive, becoming S-rank Monsters as well.
After all, even the weakest of S-rank could defeat an army of 200 A-rankers. So, the fact you manage to survive while sending in so many of your clones, which is not even worth half an A-ranker, and survive spoke of your strength, especially when you took her down.
TThat's why you become as strong as you are now. In fact, you are even stronger than almost all S-rankers in the world, with those who did not fell on the category being the same strength as you.