If you can only have one, Okote. The correct answer is to have both though. Here is why I'd say okote though. Even in situations where you'd use Nkote, you should still be using Okote. If you're not at least at 80% hitrate prior to focus, then you're using the wrong food. At that point, you'll be using okote w/ focus up anyways, so you'll have them on at least 40% of the time, even in a situation where you'd be using nkote.
Then you have the situations where you're caped and nkote would just plain suck anyways.