A lot of that is a numbers game. To catch high numbers you need lots of traps out. Getting in a routine will allow you to develop habits that let you make the same sets over and over again faster. Which means more steel in the ground, and if you have something that works, why change? High numbers guys are usually very good trappers, but they are also usually creaming the population and moving on. To catch that wised up one you may need to try something different, but if you are looking to catch numbers it is more profitable to leave it for seed and move on to areas with more game.
That being said, even for the moderate trapper, if you are setting traps after work, you're going to get more in the ground if you have a routine down and can make sets faster. And there is something to be said for having confidence in your sets. Making the same set you have caught your last half dozen canines in you are going to have more confidence in catching something in it.
Personally I have four lures in my canine bag, and tend to rotate through them as I make sets. Now two of them are gland lures which I don't normally use at dirtholes, so I generally end up with about one out of four lured sets being dirtholes, while the others are flat sets or post sets. I am finding myself going to a lot of pee post sets, either blind with nothing added or just with some urine added. But then I take forever compared to a lot of guys to get a set in the ground.
When I'm setting I tend to set, flat set, then a dirthole, then another flat set, post set, then either a dirthole or flat set again. And will set every natural pee post that is conducive to doing so. Occasionally making my own at a gang set location, but generally rotating through the same three sets and four lures to give them a choice but not get too elaborate. Then of course I run into conditions that dictate something different and all my plans of routine go out the window.
