So i've been working on a lot of speed drills and things for my picking speed and i want you guys to give sugggestions, or links on good/proper technique. I think i pick pretty decently (16th's at 185) and i don't think i am getting the most out of my picking hand. When i pick from the elbow, i go fast but get tired quickly. When i pick more from the wrist, my forearm tenses up. Both techniques feel comfortable, are equally as fast, but will one be better later on? And will tensing up my forearm affect anything when wrist picking?

(By the way, this is a question about alternate picking, Paul Gilbert style, not tremolo picking)