Update: I stopped using a stripping comb to backcomb and started doing it with a rat tail instead
Honestly I used to grab a stripping comb every time I needed volume at the crown and just go to town on the roots. About 6 months ago a stylist at a training in Dallas showed me how she backcombs with the tail end of a rat tail comb in tiny 1 inch sections, working from the ends down instead of the roots up. Game changer. You get way more lift with less damage because you're not ripping through the cuticle, and I can control exactly where the cushion sits instead of getting that puffy blob. I did a bride's updo last Saturday with this method and it held through 8 hours of dancing at her reception in 90 degree heat. Ngl I'm never going back, but I'm curious if anyone else has a trick for keeping the texture smooth on finer hair without it collapsing by hour 4.
Fine hair here and yeah, hour 4 is that make or break point. What works for me is backcombing with the rat tail like you said, then hitting just the top layer with a light mist of strong hold spray and tapping it in with my fingers instead of spraying the whole section. The tapping thing matters because it keeps that smooth outer shell while the teased part underneath stays rough. Also do the backcombing on day old hair if you can, freshly washed hair is too slippery and slides apart fast. If I have to do it on clean hair I'll run a tiny bit of texture powder or dry shampoo through the roots first, that grit gives the tease something to grab. One other thing, don't skip pinning the cushion before you start styling the rest, those hidden criss cross pins at the base keep it from sinking by mid day.