Lol you don't need to Drop the Exarch anymore, he is basically needed to ignore that cover, especially if you give him a Gun Emplacment
Harlies are the ALl-Stars this edition
Avengers are fine
Guardians are prrtty terrible, but for the way you are using them is fine. Might want to give them a Scatter Laser
Rangers are okay, but Jetbikes are better. They typically wont be moving much once placed.
If you are going to Skyleap them keep the Exarch barren. He won't be shooting things anyway.
Spiders are fine, although a Spinneret Rifle gives them mroe utility
Dark Reapers are perfect
Wraithlord is fine
second Wraithlord is ungodly expensive, that Lance is hurtful.
The Eldar, more than any other army, should not only look at the output of each unit individually, but the synergy of multiple units together and their role in the force as a whole. - Fable