Evie is fast enough to escape from your beam and your wings of wrath. To counter her be sure she has no more blinks and soars and when it happened use your beam. You should keep just a little distance as long as you don't play on Exterminate.

Imani can be easily stunned when she activate inferno canon and damage she deals from Frost Bolts and Pyre balls is very similar to damage Io deals from Light Bow. With one second out of combat Imani have no chances with Io and Luna together.