I think you could fit a PS in a range party: WL,PS, SWS, BD, WC, SR, SR, HE, HE - out of party rechargers for fun, maybe bring a spoiler. If the summoners have bows, they contribute, just like the SWS/BD. PS could also double as a tank if needed in some situations. I think archer parties benefit most from fighting white mobs with high x hp values (x5, x6+). Adding hex and not having to cast accuracy dance is really helpful for efficiency.