For nozzle 0.4mm you can set external perimeters up to 1.2mm and layer height to 0.3mm.
For nozzle 0.6mm you can set external perimeters up to 1.7mm and layer height to 0.44mm.
PrusaSlicer manual:
For other slicer follow the same steps but in the correct places.
The author remixed this model.