I don't know if some of you remember an anon doing calculations and pasting some images about its own grid simulator with calculations... If you do, that's me. I've published the app for anyone to use, if you're interested, go to this link:
https://ng-pomatools.web.app ... check the image for some references on how to use it (the damage calculation lacks labels for now) and if you have any suggestions, let me know.