krouchchocolate- I wouldn't skip the KSG, it's (IMO) the most important part of the Klasse approach; it's what provides the durability and protection.
I'd get a few layers of KG on there before I even considered topping with a wax. You might find you don't even *need* a wax topper to get the look you like (I've quit topping
my KSG as I like to be able to add more from time to time- can't do that once you apply a wax).
Don't overestimate the Pinnacle CM. I like it, but it's really just a leaves-something-behind QD, I wouldn't consider it a quick-qx product like AW or OCW. It sure won't do much if used in place of KSG, so I wouldn't try that.
Using it before the P21S will be a sort of "pseudo spitshine" which can have desirable/not effects. I wouldn't experiment with it like that at this time.
IMO you'll have enough on your plate washing, claying, and doing the Klasse twins. I'd plan to leave it at that and then apply another coat of KSG after the next wash. Don't underestimate what a big job this might be and don't overestimate the need for adding stuff to the Klasse approach (like the CM and even the P21S).