I could be 100% wrong here and I wouldn't call myself an expert but...
my 2c is that you can't ask one wing to do everything, and you can't ask one board to do everything. No matter how tailored to your "biotype" (weight?) and riding style.
Even if you go custom you will end up with multiple boards and front wings to cover 3 different sports, if you don't then you're compromising all of them.
Essentially you need a huge board for ding (moving down in sizes as you skill up), medium for wake/prone or learning kite, and pocket is best for freeride kite foil (ie not for speed and not for learning).
I had a quick try of a prone board for kite foil a couple of days ago, being used to smaller boards it felt like a tank, totally lifeless and I struggled to turn it. Yes you can ride like that all day and probably really easy to learn foot switches or rodeo etc, but it was pretty grim.
If you want a custom board made I would recommend CarbonCo.
thecarbonco.net/