Yeah personally I've found both playing for the triple supremacy, as well as going all in advancing into enemy territory to inspire/play for Lightning/Swift Advance, to be a bit of a trap with the Farstriders. Every time I've tried this and come up against a full on aggro war-band (Orcs, Fiends...) I've been given a good kicking.
I've had much better luck playing them as a more defensive/reactive war-band, not trying to force inspiration by finishing in enemy territory unless it's a good idea to do so regardless of the inspiration condition, and going with one of the Supremacy cards at most so I'm not undone if I lose one guy.