2 notes per string like the intro to TBDM's The Window or half of Cynic's catalog. I attached some examples if this isn't clear
I can never get these riffs to sound right once I start speeding them up for some reason. My picking hand starts tripping up or I get really tense and have to stop.
Do you know what alternate picking is..?
But seriously. Alternate pick it for like 5 mins straight at different tempos and you'll nail it.