The Mexicana transfer idea seems to have some potential. The miles required from Mexicana for award travel on SQ, for example, seem reasonable especially in J and F and to Australia and Asia. On the other hand, the exchange rates with LH seem very, very high. On paper, you certainly have a wide range of options for using Mexicana miles on other airlines.

Has anyone actually used Mexicana miles to get award travel on these other airlines and, if so, how difficult has it been to find award seats. Any specific and recent examples would be appreciated.