I don't know offhand the max or min ratio of Oz. to gallons recommended by Techron, but it is a fuel system cleaner/combustion chamber cleaner, not a fuel stabilizer.
I do not know if it would be effective after sitting for x amount of time then run through the tank. I do not know if it would be effected if mixed with Stabil. I'd just use techron alone through an allotted amount of gas, then refill the tank with the prescribed amount of Stabil for when it sits to reduce the chances of bad interactions between the two products.