What is the fastest F2P way to get into top 1k arena assault?

Probably farming feathers for merges:
Some guy posted about Navarre a while back:
https://docs.google.com/spreadsheets/d/1ALxzhV7pHoOr9dV15NiimBAP5qgdzQH274FUBJk5LlQ/edit#gid=1330104514