Follow your style. If your art would be more efficiently built as vectors, you must use Illustrator. If it's better executed as pixels, you must use Photoshop.
Use Photoshop for pixel manipulation, photo retouching, and digital painting. Imagine it as a canvas. You can draw and make all kinds of great images with it, including cartoons. You have a stylus and a drawing pad like XP-Pen Deco 02 Graphic Drawing Tablet , and you're all set.
And there is a wide swath of art that works best if you use BOTH Photoshop and Illustrator, making components in one program and mixing them into the other.
For example, it might turn out that your comic art is best started in Illustrator for the ease of shape and pen stroke manipulation when laying down the basic drawing, but finished in Photoshop for best control over shading, painting, effects, and other finishing.