Personally, for me, I keep Eos and Selene on Auto; haven't ever had a need to manually control them except to place them. MP management is a big thing, but having Aetherflow and Energy Drain helps a lot. Also, a good SCH can output some good DPS as well, depending on the situations. A lot of times if I am in a raid in ST or doing one of the end game duties, I will use Selene and Cleric Stance (In your case, if int was boosted, you won't want to use Cleric Stance)