A combination of Faber-Castell PITT pens, Copic Multiliners, and Sakura Micron pens.
A lot of them come in similar sizes but Copic has this 0.03 one that I use for super fine details while most of the others only go as low as 0.05 if I’m lucky.
I use Faber-Castell for bigger lines, but also the XS pen cuz it’s just a good size. I use Copic for the small details. I use the Microns for everything in between. Also if I need to I can use the other Copic sizes because I’m lazy and don’t like reaching for stuff. Lol
My Copics have a tendency to wear down fast tho. Especially the 0.03, since it’s so small and thin.
I also use a Sakura Gel Pen and Sakura Paint Pen for white highlights, or at least marking mistakes I can correct digitally.