Oniga event Q

The best node for bones is Lamentation Beach - Advanced and for pages is 3BP Blue Oni.

I've been using this guide for mat drop rate. https://docs.google.com/spreadsheets/d/1AXwqq1bRrt7_1_fK6HpY6KsY6DGmtqVuV9hIxehLuxQ/htmlview?usp=sharing&sle=true#

There is also a guide in this site. I find it useful along with the link I gave.