Easiest FFP to obtain One World Emrald/Sapphire Status
Unlike *A, where some programs (specifically, TK and NH(?)) make it easier to attain *A silver/gold status than others (and the status lasts longer than other airlines); a cursory glance at OneWorld FFPs seems to indicate that there isn't one particular program in OneWorld where its considerably easy to attain OWS or OWE as compared to other airlines. (Not Including AA Challenges).
So, fellow FF's the question is this - Which if any is the easiest OneWorld FFP to obtain OWS / OWE on.