Did Chad Nicholls help or hurt Ronnie?
He helped him win 8 Olympias. He helped him step to the next level...a level Flex couldn't (or wouldn't, due to cheating on his diet) go to.
Although, there were gurus like Aceto and Mcneal (who helped Flex in 92 and 93), Chad was the beginning of the Super-Guru. He was working Flex, Nasser, Dillet, Ronnie and possibly NPC competitors as well, and later on worked with Melvin, and he got 5th at O and a gut for it.