From what I have heard:
GH by itself - depending on dose - fat burning & minimal anabolism
GHRP6 + Mod GRF(1-29) in saturation doses = same but better results than GH
GHRP6 + Mod GRF(1-29) + GH 20 min later = Wow!
GH + slin = minimal fat burning & moderate to good anabolism
GH + slin + test = MAGIC!!!
I will not discuss doses - that is for you to search and discover for yourself. Any use or misuse of this information is at your assumption of risk...
Also understand that proper nutrition, training and rest will give you the vast majority of your possible results.