Looking to get S Ratings?
After doing some research, doing a ton of math into previous games of my own, and that of friends that obtained S ratings in the end game screen, I think I have officially found the conclusion to S ratings in league... So keeping it short and sweet. With end game timer in mind, it seems to obtain the coveted S rating you are going to need to have approximately an income of 450 Gold per minute, and a 3:1 KDA. Breaking down the gold, that means towers, first blood/tower, proper CS-ing, global objectives like Baron and Elder Dragon, kills/assists etc. The drakes aren't as important for the end game gold except to the slayer (Drakes only give 25 gold and not globally at that) but don't disregard them especially since they give global boons to your party.