Do I have to control Eos?

[lololink]

There is absolutely no reason for you to not manually control your pet.
Think of it this way, would you Aetherflow => 3x lustrate all in a row? Or macro physick to a key and just turbo controller that macro? This is what Eos / Selene is doing. CD comes up, uses all skills immediately.

It's incredibly inefficient and if you want to get the best of out the tools you are given, you will do them by yourself.

Not for Selene, she will alternate the 2 dances ( which can't be activated at the same time ) and manualy using her silence is almost impossible.