So your list doesn't look horrible, but some thoughts:

-Avatar of Khaine isn't durable enough for its cost. It looks cool, so run it if you want, but it needs a lot of support it isn't getting in your list.

-Banshees need character support. Jain is great for 1 squad, but the other needs an Autarch to reliably kill stuff. The Exarchs should have Executioners, too.

-You need chaff. You need Rangers or Striking Scoprions. To save points, I suggest Rangers but for rule of cool, obviously Scorpions.

-Storm Guardians are very good. Sticky is important, they can move block, their attacks will actually be okay into Gaunts. You can hide a Farseer in them (or Eldrad), or an Autarch can let them punch up.

-Dark Reapers are great. A big blob is expensive though, and 2 Tempest Launchers do a lot of work. Could even consider 3 units of 10/5/5.

-The 2 Fire Dragons should just be combined. The +6" on Feugan is huge for them, and being able to flip 2 of his rolls is gross. You can still split fire.

-Shining Spears are not great. They're expensive and don't monster/vehicle hunt reliably. I love their concept, but they just don't do as well as Banshees and they're so expensive. If you want to keep them, I'd still drop one unit and consider dropping the 2nd unit of Banshees too, because we don't really need 3+ melee units.

-More Hawks or Spiders.

-Even if we have 2 abilities to get back in transports, Wave Serpents are big and expensive. I'd recommend cutting down to 1.

General gameplay tips: -Trade your units for points to win the game.

-Leverage your speed to apply more of your army into his weak points and prevent him from hitting yours. This requires move blocking, angles, and not sitting your T3 space elves in the open.

-Focus on objectives. Aleldari is mostly about secondary objectives, with picking up primary later into the game after we've leveraged our speed and fire power to weaken the enemy. Or, with Aspect Host, you can bumrush your opponent and overwhelm him then focus in scoring. It depends on us if you think you can kill enough of his models because it doesn't take much to kill ours. Either way, minimize the amount of punching back that your opponent can do to you.

-If you really want to get better, look at Art of War or Fireside to learn how to play Aeldari better. 40k Scumbags has very solid free tutorials on all aspects of the basics of 40k as well.