If you just wan't to improve your pinky-skill, you should try playing a lot of legato (and trills) up and down the neck with your pinky.. I made a fast example here where you should hve your index on the seventh fret, hammering with your ring and pinky

7---h9---p7---h10---p7---h9---p7---h10

Do this up and down the neck!

Good Luck!