Samuel decided to treat the venture into the wilderness as a chance for him to increase his combat experience. And for that reason, he decided not to use his full strength when dealing with the monsters in the peak stage of the nine star rank.
As long as he did not use his full strength, it would take him quite some time to be able to deal with the monsters. But the problem was the fact that even though he was trying as much as possible not to use his full strength, some things were just inevitable.
The quality of the energy that he possessed within his body was way beyond that of an ordinary seven Star rank beast tamer. The same applied to Thunder.
So, when dealing with the monsters, by trying to limit their strength to the same level as the monsters, they still had an advantage.