Don't know anything about CO and SkyTeam, but just so you don't waste your time:

United and Star Alliance do not fly into MDZ at all.

There is exactly one flight, AC92, that flies into Santiago, and that's from Toronto (YYZ) of all places. An award RNO-DEN/SFO/PHX-YYZ-SCL is almost definitely beyond the mileage cap allowed for such an award, so you may be out of luck for *A entirely.