I have made a suggestion to solve the PK imbalance issue. I call it the equipment rating system. The system provides a numeric coefficient based on how strong your equipment is and based on this equipment rating we can set a PK rule where you can only attack people with similar equipment rating. I will give an example below.
Note: the range of points is based on the item's upgrade level (e.g baruna + 0 vs baruna +20)
105 set = 10 to 20 points
120/125 set = 30 to 45 points
130 baruna = 65 to 90 points
v15 set = 10 to 40 points
and many more even fashion and etc.
Another more direct alternative for the equipment rating is this:
Power Rating
We can measure the player's stats based on their class for example
- for every stat point is equal to 1 power rating
- 1 increased attack is equal to 5 power rating
- 1 adoch = 2 power rating and etc.
These values are just examples though.