Miracle Grow/ Vermite/ Perlite combination? Advise please.

Sticking with soil under 1000watt. Not sure the strain yet, but looking at possible doing a Vermaculite, Perlite, and Mir. Grow combination in twelve in. pots. Should I just stick with Mir. Grow, or the combination of the three. Thanks

2 parts Miracle Grow Organic----1 Part Perlite. 70/30

Ive never used vermiculite so i dont know about that.

Appreciate it anyway man