Explanations

There are Greek and Norse God's mentioned, but there is no hierarchy between them in this story.

[God of War= Ares] [God of Magic= Hecate ]

[God of Darkness= Erebus] [Goddess of Night= Nyx]

[God of Light= Aether] [Goddess of Day= Hemera]

There isn't a system or status in the story.

Technique = A style/school of learning

skill= Abilities learned from technique

Mana/Aura = when talked about both will just refer to it as energy

Rank of Energy for mortals: novice, beginner, intermediate, master, grandmaster

Rank of Energy Gathering Technique for mortals: novice, beginner, intermediate, master, grandmaster = This determines how good the technique is, this doesn't change,

Rank of Weapon technique for mortals: novice, beginner, intermediate, master, grandmaster (No sub-ranks) = This determines how powerful the sword technique is and also the max level you can reach at it.

Rank of Magic spellbook for mortals: novice, beginner, intermediate, master, grandmaster (No sub-ranks) = This determines how powerful the sword technique is and also the max level you can reach at it.

Level of Magic spells/spellbook for mortals: novice, beginner, intermediate, master, grandmaster 

Level of weapon technique for mortals: novice, beginner, intermediate, master, grandmaster = This determines what level you are at given weapon technique 

Mortal ranks: novice, beginner, intermediate, master, grandmaster

Sub-ranks= Low, Middle and High

Demi God Rank: Planet, Star, solar system, galaxy and Galaxy Cluster 

Previous Life: Arthur and Jeanne were High-Grandmaster rank energy and just got to Grandmaster proficiency at their sword techniques and magic spells.