The key to speed and accuracy is to pay attention to a few precise details of both the picking and fretting hands. Without proper instructions you’ll never understand these details- and who could be better at explaining this stuff than “The World’s Fastest Shredder”? (according to Guitar World Magazine)
Speed Kills 3 by Michael Angelo Batio Explains These Techniques
Legato technique / hammer and pull
Speed Kills 3 isn’t just a revision, it has many new techniques and exercises. Michael breaks it all down into five fundamental techniques: alternate picking, economy picking, legato technique, hybrid picking, and fretboard tapping.