Super Soleil build?

I'm sorry, but reading the second sentence of your post made me laugh.

Anyway, it's definitely a workable build, probably one of the more "unique" ones that I've seen for her.

Pretty good. Nothing more to say just good.

I think I'm gonna try this with my own soleil. IF I even get Tana.

it's probably just as good to just give her LnD 3 than atk/spd push, plush if she gets hit at all she'll still have buffed stats with LnD

It looks fantastic! Good and very original.

The build looks good. When she attacks she'll likely double and gain the effect of Atk/Spd Push, and you'll have Aether ready next turn. If you heal to full (via Renewal) you'll be able to have your A skill again plus Aether to kill, but Soleil with Aether should be enough alone for most cases. Soleil has decent bulk and speed to survive an enemy attack, so the Atk/Spd Push is the better option than L&D, so you don't sacrifice her bulk

The only problem I see is that it her HP might not always be 100% for her to take advantage of her A skill. Aether and Renewal helps, but if she takes too much damage in her first combat, she might not be able to get her HP back to 100% afterwards, even with Renewal and Aether, so you're gaining the A skill effect basically once. (I could be wrong on this, but just a thought when fighting another non-green unit)