-----So i kept thinking about and I realized the leveling system may get confusing-----
For monsters they grow through age leveling from 0-70. These levels are incredibly fast making human-race's youth struggle against monsters. During age leveling they experienced a large growth period that ends rather quickly.
Human races levels from 0-70 are usually created through training. As they experience a increase in skills and magics. Allowing for a growth period for learning abilities, giving them an advantage over monsters in later levels.
At below level 100 all creatures go through species and racial growth. while past level 100 is a individuals unique growth. Most monsters have common traits making their species growth quick. While more mythical beings have a very slow rate making their species growth and Individual growth overlap. Examples of this include: Kirin, Dragons, Griffins and more.
However some monsters have such expansive species that their growth periods may be short like the common species, or long and arduous like the mythical. Species that are like this are, half-breeds, spiders, the undead, and more.
When creature reach level 200 they begin to step into the boundary of the divine. Not gods per say, but legendary creatures. Said creatures are even harder to level up, but they gain powers that begin to manipulate the world around them innately.
Level 270 and above are often myths, mortal gods and titans. These beings have small faiths or cults that gather. From this point on the only way to level up is through said faith and myths. At level 320 the gods begin to split into tiers and pantheons.
At level 350 the challenges grow and the creatures at this point are known as plane walkers. They have no other descriptions as the myths behind them and faiths they have span multiple worlds.
The monster god in the story is around level 350.