Okay, here's a thought I had while training today... Being that I train alone 95% of the time and have never spent time with a pro, most of my training at this point is really focused on developing the marking skills of my pup to ready her for master level work. So with that in mind I've really tried to determine if it's best to setup real "meaty" singles with several factors and focus on marking more-so than memory, or would the best route be setting up triples/quads that replicate master level marks (or slightly easier until we get a higher success rate). As it stands we have a fairly good success rate with slightly easier triples than what I would expect in a master hunt test. It's difficult to determine if her marking or memory is the contributing factor to her failures in many instances though (still a young dog @ 1.6 y/o). To this point I would say my ratio of singles to multiples is in the neighborhood of 1 to 6 or so.
So, day in and day out do you run more singles or multiples with your finished dogs? It would also be interesting to see how pro's handle multiple finished dogs that have different weaknesses and how to train for each dog potentially requiring different setups if running singles.