User blog comment:DipperBelchBLAH/Can Cody Survive a Season without Sierra's Help?/@comment-11883116-20161111213049

In short way, I'd say he did win several times and he had the best social game of the Amazons. He was lucky enough to make it under the radar after the merge and that the singing rule was never taken seriously.

However, if it hadn't been for Sierra, he would have died several times, so the answer is no. Unless with no Sierra, the writers wouldn't include life threatening moments for him. But even if they wouldn't, with no Sierra he'd lose his motivation in episode 25 and have no one to cheer him up, so... the answer is still no.

Although, counting that episode 25 is already a huge success (and still a final three), the answer is also a yes (again, only if his life threatening situations would be removed).

So yeah, a "maybe" indeed.