NoHaremPlease
-Mortals can learn magic and how to manipulate the mist. -they can also be blessed by a god which will give them aboltiies, or even become a champion of a god,( slightly stronger abilities than their progeny) -in various patheons its shown that mortals can become stronger than gods and slay them. -you can learn cultivation from chinese, indian, japanese and korean pantheons that focus on using worlds natural energy to temper the body. -mortals and your better mind woll allow uou to practice more martial arts. weapon throwing( like axes or kunai or throwing knives) Take inspiration from fate franchise and how mortals could kill gods.
A Mortal in Percy Jackson how original. I hope he becomes so skilled in something like a sword or spear and magic just like Scatach where she is only mortal but can kill Gods. The Greeks/Romans ain't the only pantheon in that Universe maybe you can insert them like the Celtics so he can learn under Scathach.