I can’t speak for what’s “right” or what will help with anyone else’s fitting challenges, but this is what I have found to be the most effective and comfortable for me.
I have lace-up Intuition Liners (FX Race). I take those out of the shell, put them on my feet, get them cinched with the pull-string laces, then slip into the shells. This is much easier if the shells are warmed. I use Noodler’s method of pulling up on the back of the liners, actually I half-way pull my foot-with-liner out of the shell and then settle back into the heel pocket, usually 3 times doing this. Then I pull up on the tongue of the liner a bit, to get the top of the liner tongue higher against my shin, as that’s the first point of leverage, and if it has slipped down a bit I can feel it digging into my lower shin at the end of the day.
Then, I tighten my Booster strap, basically as snug as I can make it without straining too hard. The top buckle is then buckled to the first notch, then the same on the second (ankle) buckle, then the top buckle may get tightened to the second notch. If I’m working with beginner skiers I leave it looser to demonstrate flexing the ankle more obvious. lastly the the two lower buckles get closed on the first notches.
That’s it. I can leave it alone, all day.
I am grateful that I found a shell fit that’s pretty close, and didn’t take too many bootfitting sessions to get things punched/molded into shape.