Congratulations!

But not sure how you can get married on Friday, spend the night in CDG and fly at Saturday noon to SIN.
But if so, you will have to rush to NAP to get your flight.
Easyjet is an option if the timing of the flight allows it.
It is a good airline and you have to factor in all the costs. As Orbitmic mentions, EZY allows you to preassign a good seat. The first row is expensive (I prefer the right side) but also gives you speedy boarding and plenty of leg room. You can pay for decent food. The shape of their seat is better for my back. Their on-time record is better than AF. If the all-in cost is better than AF, I would not hesitate to choose EZY. That is if the flight timing is convenient.
Having a connection in another airport to get from NAP to CDG is no fun, especially before a long flight to Bali.

And I dobt that the cost of a one-way on AF1179 will drop, as this is going to be a very busy day for leisure people.