Black Mages love Enhanced Arrows. I frequently get a lot of BLMs that ask me explicitly for Enhanced Arrows--so they can churn out all those big-dick Fire IVs. I've heard that SAMs like Arrows after Balances. BRDs... are kind of okay with Arrows, I guess. I will take an Arrow, but I much prefer Balance/Spear. MNKs are probably indifferent to them now, but I know back in HW I knew a couple of MNKs/DRGs that explicitly would click off Arrows because of TP issues due to higher skill speed.