You need to ask GW about that, as no Craftworld Eldar can carry Brightlances or Star Cannons due to how high their technology level is, or something...
Like c'mon, they can carry shuriken cannons, and so can platform weapons and vehicle turrets. Where my heavy weapons at Of course, Eldar Devastators would probably be OP, but still
....And this is why we need the Dark Eldar as a faction within a faction subfaction! Jokes (Hopes and dreams) aside, I think we should try a different direction. Instead of making new weapons, what about ammotypes that make them function differently? Like high-density shurikens that give you a smaller mag and firing rate, but more damage, or a superheated core for the fusion pistol, which only fires one focused blast of high, pure damage then needs to cool, or hell, bladestorm shurikens that turn the air into a storm of metal with how many are in the magazine.
