Need some help configuring my graphics settings

I’ve recently got my hands on a 3070ti graphics card and wanted to up the settings I play the game while still maintaining 60 fps (at 1080p). I’ve got an i7-9700k cpu (liquid cooled), and 16g of ram.

When I cranked the settings to high across the board, I seemed to do fine in some areas (orbiter, some missions), but I’d also struggle at other times and see fps dip to about 50. What graphics settings should I try and lower from high settings first to try and squeeze performance out while maintaining the higher effects?

I’m also noticing ram usage reported by my task manager hitting 70-77% at times. This seems really excessive to me.