This script is a replica of a feature from an MMORPG called PWi.
You now have two new stats, atl (attack lv) and dfl (defence lv).
For every 1 atl (Attack Level) you have above your targets dfl (Defence Level)
you will deal 1% more damage.
For every 1 dfl (Defence Level) you have above your targets atl (Attack Level)
you will take 1% less damage.
The same rule applies for actor and enemies.
You can increase your Atk Lv / Def Lv a number of different ways,
via notetags, script calls && other scripts (like my distribution system).