I just recently started DEldar as well, so I hope this can help with my limited knowledge

. Your list seems to lack a lot of bodies. You've only got 20 normal infantry troops and they're only t3 with a 5+ save, so when they do get shot at they'll go down very fast. And once you've lost those important objective stealers, it could be game over. Perhaps a couple in raiders instead for more survivability? (1
HP and those extra 5 kabalites can go far)
I'd also recommend dropping at least 1 ravager, if not 2. The same job can be achieved by scourges/blasterborn, which are usually cheaper and a lot more flexible, I'd recommend swapping those out.
Also maybe give your archon armour of misery for an armour save once his shadowfield breaks, and maybe put him in a unit of blasterborn with a webway portal for something you really want dead.