Don't listen to anyone who tellls you to max out "Weapon of God" or "Blessing of Haste". Zero on Blessing of Haste cause unless you max it, it's pretty much worthless. Weapon of God, 1 and 1 DNA if you are feeling generous. ^^
Sleep 10 makes a huge difference. So max sleep. I currently have it on 5 on my tempest. Waiting for a free reset to change my build ^^.
having and hot having the weapon buff and attak speed buf can mean the difference between winning and not winning in every group pvp in this game. it can also mean the difference between an hr raid or reduced to 20-30 min in a raid. its all according to what satisfaction u want from ur character.