1. Your main role is to make sure every character and main pet in your dp is buffed at all times. All 3 buffs not just Rock Energy and Sacred Fire.
2. I know most of the Huna's hate to do it but you need to find your fastest attacking melee class. Such as Assassin or if no sin then look to a champ or a bs with a dirk. If all else fails then focus on your main tank. And every 30 seconds you need to Gust them. When used in an entire dp this helps the overall kill speed a lot more then you would think.
3. Use your seal for some sort of crowd control. It has a 90 second cool time on it but it lands a lot. Even on ?? bosses.
4. Restoring Purified Water. Use it on your tank if you need too. It will help your cleric to save on mana and not put your party at risk of a wipe out.
5. You have a couple Damage over time(DoT) attacks use them. Even if they are down on level 1 to help conserve your mana. They help.
6. After all that just concentrate on wacking on mobs with your axe.