This calculator will take your current base primary stat (Atk, Def or HP) and identify whether you have scaled your primary stat and crit damage efficiently. To use the tool:
1) Select from the list of Champions
2) Enter your current primary stat and critical damage %
3) Click "Calculate"
Your build will be analysed and it will identify whether you should add more crit damage or primary stat and how close you are too an efficient build.
Note: You do not need to factor in the increase stat buff (ATK or DEF) as it won't effect the efficiency ratio for damage.