Um, we've been on one for a few years. If it wasn't for Lukaku last season we would probably be right on their course.
No we haven't though have we? Villa looked like relegation was a guarantee for about four seasons. Even in Martinez' last two seasons we didn't look like getting relegated. The Lukaku thing? Maybe, maybe not. The old "we still would've finished 7th without his goals" stat springs to mind.