For one and a half day I would not bother with either - you'll spend more time in flights and airports than in the country.
Stay put what you are, and either plan a longer trip or postpone the whole thing for future.
I completely agree with MangoMunkyand Schonefeld. Your plan would be a comp,eye waste of time and money.
Agree with the above comments. For 1.5 days it really isn't worth coming to Indonesia. Suggest you come when you can stay for at least 5 days or longer.