[mastermags]

Nearly impossible to rank. What's good for one person is not good for the next guy. It's complicated, but when making a choice you need to look at pay, work rules, bases, etc that would work well for your situation. I would and have advised against chasing upgrade time around because a quick upgrade could go to a several year upgrade in the blink of an eye; then you better get comfy in your seat and hope that the airline's pay, work rules, bases and etc are good for your situation.