the art of guitar has a video about this exact style of picking, it's a really interesting thing, think the title's "stagger-stroke riff picking" . he talks about creeping death in it, you should check it out
@@winter_on_venus no problem dude, i dont think the name isn't exactly widespread though, and Mike just called it that in the context of the video, still it's cool that you discovered it yourself either way, good job!