Tip from a Dassault test pilot when we crossed the pond with our brand new 2000S:
Use the alternate FPL. Plot the first WPT of the first track, then all the WPTs East/Westward, at the end of the track plot the last wpt of the second track then back to the first etc...
It takes a bit of time but it gives you great S.A.
(Of course don't forget to tick the alternate FPL in the INAV menu)