also to key in Id advice using Eos most of the time, how generally anyone feels selene is better is beyond me (she not, however she isn't bad either) Eos buff to healing and AOE heal (which if used in tandem with rouse> Fey Illum > whispering dawn) becomes a super HOT that you can buff with a succor and sit down and watch your fairy keep the party topped up while you doze off somewhere.

use selene if you feel the grp wont require a lot of heals and want to give the dps more fire power to run thru a dungeon faster. you should always be ready to switch your summon on the fly tho so that's why swiftcast is a must have!

swift > summon Eos/selene based on the situation and keep rolling!