Hi
KAIO makes a good base for alot of products, im not sure if was going to use Souervan i would bother with the Sealant part just b/c its time consuming.
Again, i dont know what extent or Zaino product you have. But if your prepping for Zaino with an AIO first you can probably skip out on the Zaino layer (Z2/Z5etc).
Personally i prefer a glaze before a Nuba wax, personal thing. Different glazes enhance the paintwork in different ways first.
Geoff