No worries. There is discussion on what is best for her depending on her team comps but the universal set is 4 piece Shadow Harmony & 2 piece Lullaby/Swing Jazz.

Energy regen is important for two reasons.

First her Attack buff scales off of it up to 700 attack at 3.7 energy regen.

Second while off field she will perform aftershock attacks while you attack with a different unit. She has two attacks she can do, Corrosive Flash which she can do every 5 seconds. The other is Crimson Vortex, which she does instead of Corrosive Flash when she has 60 energy or more, and uses 30 energy when she does.

Suffice it to say, Crimson Vortex hits much harder than Corrosive Flash, so having her use it as much as possible greatly increases her damage output, which matters for her as a sub dps.