2 & 3 for me. Most of my customers have some pretty high end stuff and want it waxed often, so durability is not an issue. They want an extreme shine and gloss, and I need it to be easy to use for my benefit.
I use Moose Wax (Clearkote) for those who want a 1 step wax job,
Meguiars Hand Polish and #26 for 2 step, and Hand Polish and
Pinnacle Souveran for the high end 2 step jobs (and obviously, if they need a deeper cleaning or claying, they end up with a 3-4 step process).
My own car gets waxed about once a month and QD'ed 2-3 times a week between washes. I have an Accord, so it isn't very big and monthly waxings don't take that long, so I will stick with carnubas for my own use also.