I have toned down the amount of stats in the story but it is very important to understand how the characters progress. So here is a description of them. Some new info in here, so spoilers.
Title: A position that is earned
Level: Average of attributes strength skill and intelligence
Race: species of the character (This stat is not shown often)
Class: How attributes are used/manifested, advanced users are better able to focus mana into attributes.
Life Force/Mana: Amount of power that can be used for physical/magical skills
Skills: special techniques either for combat or utility can be active or passive.
Experience: used as currency and offering to the gods
God express power with Blessings and Curses. Usually used on locations, items, or persistent effect on people: Skills
Gods get power from experience and give it to worshipers.
Rayner and Axel use skills without the need of gods by focusing on feelings of pain. Axel's attributes are expressed through battle wisdom and Rayner's through charisma against enemies.
Mana manipulation: supplementary skill used by high-level Worshipers. It allows users to use skills with more flexibility, pushing them to their limits. Also, it's how people use magic.
Magic: the combination of skills to provide desired effects
Weight and Focus for Attributes.
Weight is where most mana goes into attribute. Focus is how that weighted attribute is used. Roddrick will teach Axel and Rayner how to use this essential and basic technique.
Example is Axel's mana heavily weighted in wisdom but Focus is how he uses it, like to form better battle plans.
Of course worshipers use different attributes and it can be focused in different ways. Worshipers don't need to be well weighted in an attribute to focus it.
If all this sounds like too much, all you need to know is for everyone except Rayner and Axel, gods are needed for power and mana and experience is used for that power.
Unlike other gamelit, litrpg, stat driven stories, I don't use numbers for attributes as it varies by how much mana is put into the attribute(weight) and many are used differently depending on the person(Focus) using numbers wouldn't work, and honestly, I think in many stat driven stories, the stats become random and hard to comprehend.
So for this story I will keep the numbers light and small. I use it more to show how long a characters can last in a fight, how many times they should be able to use a skill and where they are after important fights and events.
You've seen Axel and Rayner get frustrated at their progression as they are used to leveling systems where you level up when you beat up enough enemies. Sometimes they get nothing for great deeds.
Any questions, message or comment. Will answer if it's not too spoilery.