I’m the exact opposite of so many people here!! Dropping digital for everything but color has made me infinitely faster than I could possibly ever be if I was full digital still.
One of the things I do for one of my comics is I draw it JUST a little bit bigger than what the print size will be so the originals are pretty small and I can fit two pages per one sheet of paper. At this size for the past couple months I have been writing/drawing/inking four pages a day traditionally which I do Monday-Wednesday with the end total being 12 pages and then I spend the rest of the work week on other projects that I have to draw a little larger and are a bit more tedious!
There’s also batching, which I tend to do in four page patches. Pencil all the pages first, then ink the panel borders, text, and speech balloons, then all of the characters, and end on the backgrounds.
I think the major thing that’s helped with my speed is honestly just having done it A LOT for the past almost decade now professionally. Inking traditionally I learn to roll with the mistakes and eventually I stop making those mistakes and I can just relax and let my hands move. It’s a very no-fuss process for me. And I don’t think I’m even remotely good at a lot of things but I can honestly say; I’m definitely faster than the average cartoonist and anybody who’s had to share a studio space with me can attest to that. I do know some folks who are as fast or faster and they also mostly work traditionally so its definitely not just me and I’m definitely not crazy!!! 