Balance - Highest dps in the party.

Bole - The person that needs protection, in PvE i use it on tanks. In HoH, i use it on healer (myself) or tank. In PvP i use it situational.

Arrow - BLMs are great with this since they have the highest cast times, other than that everyone. But BLM priority.

Spear - Bard & Monk priority since they work with crit.

Ewer - Doesn't effect DRK and BLM, so NO to them, otherwise use it on who has low mp.

Spire - TP regen.

Ewer & Spire mostly used for Royal Road.