Before creating your monetisation, it's good to understand what people actually pay for.
People are busy and impatient. Once you make your player's hungry for the updates and other content in the game, they will be impatient. You can make people wait for
When player's feel the game they are playing is well done and they are valued, they will be more ready to make in-app purchases.
Player will get stuck in places when they want to continue the game. This is a good place to offer "help". Player's might even at first recognise what really is happening, but they get to continue the game they like.
Have you heard of Pay2Win? You dislike it? In Asia, it is totally acceptable and even more, it is respected.
So don't overlook this, but understand that different player's from different locations can have different values.
You should rather provide something for everybody.