This is something that I've had a lot of fun working on. In this spreadsheet, you can compare four different builds. You can manipulate values such as "level," "stat point" and "build." I added a few functions to debug impossible scenarios, such as having "a level of 401" or "105% AP" or a "5114 build." Enjoy!
Note: Only change the values that are shaded in light green!
#1 Enter a whole number for level; ie: enter "100" for a level of 100. (If you enter a value lower than 1 or greater than 400, there will be an error.) #2 Enter whole numbers for the various stats; ie: enter "25" under AP if you want 25% AP. (If you enter a combined percentage greater than 100%, there will be an error.) #3 Enter the build; ie: enter "4114" for a 4114 build. (If you enter a digit lower than 1 or greater than 4, there will be an error.) #4 Even though you can compare between 4 builds, you may want to compare less than 4 builds. Uncheck the pages that you do not want to compare. You will be able to see the difference in stats across the builds you are comparing.