Well, if it's graphics for a game, and time is of the essence, then whatever gets the job done should be fine. HOWEVER, in the world of true pixel art, the burn tool isn't exactly a tool widely accepted by users. In fact, tools like the burn tool and tools like it, where the program decides where to place each pixel, are practically forbidden and taboo. It's fine for high res digital art, but for pixel art, you might wanna' invest in more patience, rather than allowing the tools to do most of your work.