I think the hardest trails out there are boar to theren, faldesu ferry to fens. Not sure what ranks those are at.

Scouting counts in the sniping calcs. But ya, it seems pretty underwhelming. I do use a small handful of useful trails, occasionally HUNT for non training purposes, sometimes SCOUT AREA if I can't find an exit, but I don't think I've ever had a failed check because of low ranks even while moving up in skill.

Jalika

Vaguely, I remember being able to run all the trails at ~150-200 in scouting. So the requirement is pretty low for scouting.

Bluefalcon