I was messing around with a spice rub for wings and meat, using the Mission Chinese spice mix as inspiration. Using what I had on hand, I came up with this blend that works really well
Ground fresh cumin
Urfa Biber (a Turkish chile pepper that is both dried and fermented, giving it smoky and raisin notes)
Grind it all up on the coffee grinder, use as rub. I can't be exact on proportions, since of course I don't measure. Heavy on cumin, and Urfa Biber, a bit lighter on sumac and Szechuan peppercorns.