Stippling can make a extremely delicate and fragile gradient, great for places that demand a gentle transition. I like to use different pens for different things. I take advantage of thick markers for giant shadows since they’re massive and chunky and canopy plenty of paper speedily. I like Sharpies https://stephenyhsyc.liberty-blog.com/37134514/ink-pen-drawing-techniques-no-further-a-mystery