Here's an Alfie strip for Christmas at the pencil stage. I usually letter it first in the computer to get the accurate size for the final art. Also so that all my word balloons will fit in the strip and comic book naturally and not seem like they were jammed in with a crowbar.
After the pencil work is done and is something I'm happy with, then I ink it, scan it and then color the strip and then drop the lettering right on top. Here is one that I inked roughy so it's not in pencil. I try to get the idea down as completely as I can.