Choose any route you like on MP0 and time it. Do the same route on MP5.
If your MP5 time divided by your MP0 time is less than the ratio of 32.59/15, then it is more efficient for loot.*
You can do this for any MP, substituting in the appropriate time limit.
*Provided the 50/50 ratio of loot from elites versus whites holds true for your chosen route.
ohhh yeah that makes more sense. I'll have to play around with it. thanks for the info