Sorry for no posting screenshots.
I have problems with my pc >.<(troyans etc.)
Ok. here we go.
1. Firts find your lvl adress(you must be under 40lvl)
Example: you are warrior 25 lvl
2. Change your lvl to 40+
3. Buy 3 rings of fighter +3
3 1/2. Before you try to Equip rof's +3 you must have be equiped with rings on lvl lower that you have original.Example rof+1 (i dont know why)
4. equip 2 of them.
5. Right-clik on the third one and after few seconds your dmg will be decreased
Screenshots
Before:

After: