Silent Dusk needs to be replaced with something more useful. Selene is the least used pet simply because she has one wasted skill. the chances of you ever being able to productively use it in an important fight is slim to none.
A single target Regen that stacks with Eos’ aoe regen would be nice. Or a gift of mana giving 50 mana to a single target every 10 seconds. Or puts a mini shield on a target or I dunno does a cool back flip, even that would be more beneficial than her silence.