I don't buy blends so have no idea what it tastes like, but using the list of ingredients from their website I can tell you what I would do anyway.
The ingredients from their site: salt, sweet ancho pepper, onion, garlic, Mexican oregano, Tellicherry black pepper, cayenne pepper, cumin, sweet paprika, chipotle pepper and cilantro.
Skipping the salt (I never put salt in rubs -- I salt the meat first, separately, which allows me use as much or as little rub as I want without affecting the salt level), and skipping the superfluous (the paprika, utterly lost here; the cilantro, which is horrible dried and pointless, imo, here), I'd start with:
3 T ancho
2 T granulated onion
1.5 T granulated garlic
1 T Mexican oregano
2 t ground Tellicherry pepper
1 t chipotle
.75 t cumin
.25-.5 t cayenne
T = tablespoon t = teaspoon
I'd likely add .5 t rubbed sage to this
Mix well then scoop a little out with your finger. Top with a tiny bit of salt then taste; adjust from there.