Hello fellow elder/dark elder player. Your list had me thinking, and I made an alternate list you might like. Using your models... for the most part, It would require a box of Warp Spiders. But they are arguably the best Aspect warrior, and a Dark Eldars best friend when it comes time to kill gargantuan creatures.
~~Dark Eldar CAD (970pts)
5x Kabalite Warriors, Venoms with Splinter Cannons
10x Kabalite Warriors, Raiders with Nightshields and Splinter Racks
Heavy Support (420pts)
-3xRavagers with 3xDark Lances and Nightshields
~~Elder Aspect Host Formation (530)
Aspect Host +1BS
-2xDire Avengers Units
4x Dire Avengers, Exarchs with Twin-linked Avenger Shuriken Catapult, Wave Serpents with Holo-fields and Twin-linked Bright Lances
4x Warp Spider, Warp Spider Exarch with Twin-linked Death Spinner
Took a lot of upgrades I thought you were missing, splinter racks, and night shields... I think you need that cover save, especially since our guys snap fire having been inside a jinked transport now. Best to avoid jinking, get yourself 25% obscured whenever you can. Splinter racks should be an auto include with 10 warriors in a boat.
But yeah My list does drop the Reavers, Seer, and Vyper. But you get Warp spiders which in turn enables all your elder Units to now hit on 2+ thanks to the Aspect Host. Plus your survivability has moderately improved with all the night shields.
If you don't like the shields I would drop all of them including the Holo-fields, downgrade the Exarchs guns as well. That leaves you with 120pts to experiment with.
PS if you do run with Reavers make sure to take Caltrops.