You might try quinoa and potatoes instead. More genetic diversity among those crops and less problems if you plant many varieties. Also, trees in the tropics are often overlooked as a source of high protein food stuffs.

Here's more information about useful trees to grow in Indonesia.

https://permaculturenews.org/2016/02/05/6-magical-and-medicinal-trees-to-grow-in-the-tropics/