Thor

Thor is the 15th evolution stage. His design is obviously based off Thor from the Avengers, and he uses his signature hammer, Mjolnir. (Founder's Note: if only he had lightning powers in game, #AmIRite?)

Strategy
At this point, you're probably very close to number 1, so just KILL everyone. Still though, avoid people that are stronger than you. If there even ARE people stronger than you at this point.