Cyclops - what they could do to being made from super metal? Brutes - maybe.
And,if he did notching except waiting till other found clues/some of them die,others get weakened/ then he had good chance for winning doing notching almost to the end.
So,Megatron could just wait near Mountains till technology start working,stomp on survivors and take artifact.He could ignore local wildfire - it could do nothing to him.