If you have heard players like Joe Satriani or Alan Holdsworth, then you have witnessed truly breathtaking legato technique (better known as hammer-os and pull-offs). Having good legato technique will help balance out your picking technique. When you want that aggressive, in-your-face sound, then stick to your picking technique, but if you want to play smooth, and fluidly, then legato technique is what you want.

Now let's apply legato technique to a scale. The example here uses the A Major.

Nothing unfamiliar here - the good old Major scale shape at the A position.

This exercise wraps up the legato exercises. This is just a nice way to practice your scales. What I do is go through each mode one after the other using this pattern. If you can make it through all 7 modes without finger fatigue, then you are progressing nicely with your legato technique!