What is the optimal formula for calculating user rating?

Question

Ratings

Good day, help me to make a formula for calculating the rating of each user.
I have the following data: user level (1-3), number of friends he invited, total amount of account replenishment, number of account replenishments.
It is necessary to draw up an optimal formula for calculating the rating according to this data, I am ready to reward the person who will help. Thanks for understanding