So, you want to know how to tell if you're weak? or strong? Add all your stats up. (strength, stamina, brain, intuition) Then, once you add them up, divide the number you got by your Hero's level.
1-10 low
11-20 better
21-30 Good
31-40 Strong
41-50 Over powered.
51-60 You should really stop playing this game
61-70 No comment.
71-80 O.O