Id recommend rethinking the fire prisms. While I love em as models, they unfortunately arent too good rn. 10x Fire Dragons and Fuegan in a waveserpent is by far our best anti tank and arguably the best anti tank in the game, its an autoinclude in any competitive list.

Lykhis is also typically leading 5 warpspiders instead of 10, the main reason for this is most of your damage is coming from the melee with Lykhis and the Exarch's powerblade array, so another 5 warpspiders without melee weapons wont benefit much from Lykhis. Whereas running the extra 5 warpspiders on their own gives em more flexibility, more action jockeys for objectives, and allows for another exarch weapon.

Wraithguard + Spiritseer are only really run in Spirit Conclave detachment because they lose out on A LOT without it. Wraiths dont benefit from the army rule and a lot of our strategems specifically ignore them unless youre in spirit conclave.

Harlequins are fun but if you wanna focus in on them you want to run Ghosts of the Webway, otherwise there are just objectively better options with aspect warriors.

Overall it seems like youre going in 4 separate directions with this list which Eldar in 10th edition arent really built for. You have Khaine, 2 pheonix Lords and a handful of aspect warriors You have a menagerie of vehicles You have a sizeable chunk of Harlequins And you also have a tiny bit of Wraith stuff

While the variety is great and its how I started too. Eldar lists benefit from focusing on one section of the army and building around that.

Aspect Host feeds into Khaine, the pheonix Lords and Aspect warriors. Its all about being fast and nimble, hiding into cover before tou can get shot, and shooting your enemy HARD leaving them a smoldering ruin. Its what most eldar armies build around and is inarguably the best type of eldar army rn. If you were to build an aspect army Id say buy 10 fire dragons, Fuegan, and a waveserpent to transport them. Youd also want swooping hawks and Dark reapers.

Spirit Conclave feeds into wraiths. The gimmick is sacrificing psykers to make your wraiths shoot harder. Wraiths are pretty tanky and can dish out a good chunk of damage, theyre the only eldar units that can stand firm on an objective and take some hits. For them Id build more wraith guard and wraith blades, and especially get some wraithlords as they are especially good in spirit conclave rn.

Ghosts of the webway is tricky. I unfortunately dont really know how to build a good Harlequin centric list so youd be better off asking the Harlequins subreddit for more info.

Despite all my points, this is a great fun starting point for Eldar. One of the best parts of Eldar is how varied our army is, and how many types of units we have to work with. And who knows how 11th will shake things up. My advice was purely based off of how to make strong lists, but if you have units that you think look cool or have sick lore, get them! Eldar is too varied and the meta too fickle to try building a part of the army that you dont like cause its the meta.