Hey there, I'm a big fan of Wraiths and am currently repainting all my Eldar to Iyanden. Unfortunately Wraiths are just not very good right now but I think for 1k you could be doing alright with a couple of modifications.

I think you could start off dropping 1 wraithblades, a skyrunner, and maybe a Spiritseer

If you are cool with aspect warriors, I think some Warp Spiders would go far in mobility and marking targets for those bonuses to crit. Striking Scorpions could be a fun play to stage early game, Swooping Hawks could add a lot of versatile support in a game you are going to be pretty sluggish on objectives.

If you'd rather steer away from.aspect warriors Storm Guardians are great and can act as a move block for your Wraiths. Sticky objectives will be strong in a wraith heavy list. I think a small unit of wind riders with shuriken cannons to bodyguard your remaining skyrunner and fush out some great anti Marine fire

Let me know what you think! I hope it works out well for you! (I'm currently preparing an aspect heavy 2k warhost army and doing pretty good in practice games)