I've got an 85w SMOK mod that I use around the 24.5w - 31.5w range. I find with herb, the higher the setting. The harsher the hit. And the more it tastes like having a dry pipe. Rather than being able to enjoy the palette of the herb in the tank.
Some atomisers also don't like to be used with temperature controlled mods. Rather, they're suited to watt and ohm regulation.
My TFV8 Baby Beast liquid tank is rated up to something like 60w at .4 ohms. And my Mr Bald 2 dry herb tank is rated to only 30w at .5 ohms. Neither are suitable for thermal regulation mods.