There are three main ways of getting more powerful - which include the warrior path (body strengthening), mage (mana strengthening), or a mage warrior (strengthening of both mana and body at the same time). There are 9 levels in each rank. All of the levels are ranked from low, mid, and high. Low = 1 -3, mid = 4 - 6, high = 7 - 9.
Warrior - they use mana to strengthen their bodies to increase all of their physical aspects such as speed or strength. More powerful warriors are able to infuse mana into their weapons and even eventually be able to attack a long-distance away. Warriors rely mostly on talent and the potential to keep breaking boundaries. Weaknesses being they can be easily dealt with at range, although this problem will be curbed in the later stages of power but still definitely present.
Mages - they use mana to perform long-range attacks and keep attackers at bay. Mages usually rely on monstrous comprehension to outdo the warriors in talent and potential. More powerful mages would eventually be able to summon avatars they are attuned such as a fire avatar or an ice avatar. Weaknesses being if a warrior is able to engage a mage in close combat unless the mage is much more powerful or has a good defense then it would be impossible to win.
Mage Warrior - they are able to deliver both devastating close-range attacks and long-range attacks. They also have a very strong body and are able to perform the abilities of both mage and the warrior. Double the strength of others at the same rank. Weaknesses being that it is usually much slower progression due to having to focus on both ways.
Ranks for both warrior and mage: (This is the mortal realm, the new realms will be added once the story gets to the point)
[Novice - Mage / Warrior]
[Adept - Mage / Warrior]
[Expert - Mage / Warrior] - the level where warriors are able to fuse mana into their weapons.
[Master - Mage / Warrior]
[Grandmaster - Mage / Warrior] - the level where mages are able to summon an avatar or multiple if they're talented. The level where warriors are able to attack from a long-distance away (though it is still shorter than a mages attack range)
[Lord - Mage / Warrior]
[Emperor - Mage / Warrior]
[Saint - Mage / Warrior]
[Divine - Mage / Warrior]
[Celestial - Mage / Warrior]