No! Keep yourself to one exercise, that should be enough (talking from my personal experiences).
Before I did bundled stretches behind the ASS.
I did this... only.
Downward Bundled Stretches with the LENGTHMASTER 3.
Then when I feelt these didn't gave me the intensity I needed I proceed to doing only LM.b ASS.
Here's a video:
LENGTHMASTER 3 bundled stretches, behind the ass (Abbrivation: LM b.ASS).
But keep in mind that I have done everything somewhat controversially.
In the beginning I did downward bundled stretches 1 minute per side. Bundle to one side (right) stretch, then bundled to the other side (left) and stretch (bundle = rotate).
But then I started to keep the stretches for 5 minutes. I'm not saying you also should do that. Start with 1 minute per side.
Just ask if I didn't explained clear enough.