DonĀ“t know why you would want a lower ball speed, (if you did that your " smash factor" would be lower) Smash factor is the ball speed / swing speed relation and the goal should be 1.50 (IE 100 mph swing 150mph ball speed). launch angle could be OK if you got the backspin down to around 3000- 3200 should give you more roll instead of 6 yards My opinion...... try pro-v X, get a shaft that is tip stiff and you wont need to change heads.
hope this helps!