Easter Friday is 19 April 2019. So a holiday time for many people, particularly in Aust/New Zealand, where schools will be on vacation for 1 or 2 weeks. Will make flights & hotels harder to get.
Great Circle Mapper MUC-LAX-PPT
Great Circle Mapper MUC-SIN-PPT
Airlines & routes in wikipedia
https://en.wikipedia.org/wiki/Fa%27a...tional_Airport
https://en.wikipedia.org/wiki/Nadi_I...tional_Airport
Going via Asia may get better results
Some threads on similar topics. There other threads
https://www.flyertalk.com/forum/unit...30-2018-a.html
Consider these
Award booking services - a list and some reviews