Power ranking...
(Took reference from Seven deadly sins but alter that slightly.)
The numbers only applied to the world Embra is reincarnated to. In that world,
Power level is a way to measure the power of a person. It calculates the raw power of a person's soul and physical power of his or her body.
It calculates based on three facts.
-Current physical strength (Meanings if he is injured or get diseased, it will be lower.)
-Current willpower (including the determination, emotions and resolve to do something.) But It shall not exceed the maximum capacity of the soul or he or she will break.
-Current Magic power/Chakra. (Again, it do not calculate how much one has control over it or how much mone can manipulate.)
All these numbers are in raw forms and they can change depending on the above facts.
Power level:
Normal human child: 100
Normal human teen: 200-220
Normal human adult: 300-400
An average warrior: 600-1000
An average mage: 200-600 (Mage here is defined as someone who can manipulate energy outside or inside their body but have the lower physical strength and can't fight physically.)
This is just an average power level not featuring their skills on a weapon or their control over their body or an innate power. This is just an average one can reach if he trains normally.
An average demon who has eaten more than 10 human : 750-800
An average demon who has eaten more than 50 human : 800-1600
An average demon who has eaten more than 100 human :1600 - 3000
An average demon who has eaten more than 500 human :3000 - 5000
An average demon who has eaten more than 1000 human : 5000 - 7000
These ranks are purely based on my calculations and it became harder and harder to raise the power level as the numbers get higher. This is just an average power level not featuring their Blood technique or their skills on a weapon or their control over their body.
Yes, I know, the numbers are so low that it cannot even be compared to SDS but, I guarantee you, this is for this world only. There will be changes for the new world.
(Be frequently updated as the story go)