When stacking is it better to take all your supps at one time or take one set of pills, then another set after say 20 min? Or is taking all the pills at the same time the way to go?

Methyl 1-D and 1-GH-1...taking it for about 2 weeks now,
Methyl Masterdrol...started taking it yesterday,
I plan to post with formadrol.

I been lifting only during the summers since 1999.
weight 120lbs.
height 5-5
age 34