I really like the sounds of this! You've thought out your planting way more than I ever do, lol! Bear in mind that the anacharis will quickly grow tall and reach the surface, and will need trimming back often to avoid it blocking the view of what's behind it, and to stop it shading out the others and hogging all the light.I have a pretty good idea of what I'm going to do. A back row of water wisteria and maybe some valisneria in the corner. In front of that; Brazilian pennywort, bacopa monieri, anubias, java fern, planted anacharis and crypt for looks.
What's the latin name for spangles? I'm not familiar with that common name.I'm going to float some frogbit, spangles and wisteria. I know you recommended only one kind of floating plant. But I want some of the tank to have those long frogbit roots but not the entire tank. I still want to have a lot of floaters to process the ammonia.
If you'd like to go for multiple floaters, then absolutely, go for it! Not mixing them is more of a personal preference, but I wasn't sure what you meant about buying more to have enough for cycling - whether you meant you'd need say, more than one pot of frogbit in order to cycle the tank. But since the floaters tend to grow fast and reproduce prolifically, it would be a waste of money, when one pot will lead to plenty of frogbit soon enough!
The frogbit will be at the end of the tank furthest from the bubbler because I read that if the tops are wet, they can rot so I don't want them getting splashed on. The spangles and wisteria will fill out the rest.
Make sure to allow some open space for gas exchange, and any fish that like to dash to the surface for oxygen like cories and labyrinth fish. Otherwise, sounds awesome! Would love to see it and how it progresses, so I hope you make a journal thread!