If I had to pick one housing style to shoot for everything from here on out, it would be a double pin. I personally will never hunt with a single pin again. I've been burned twice and in the heat of the moment when I say in my head hold 4" high, I end up holding 4" high of the back and not the vitals and give them a haircut...
With our double pin, I can shoot to 50+ yards without moving my sight. For more open country hunting elk I set my 2nd pin at 40, my top pin ends up being around 26 yards (280fps hunting rig) and my level ends up being around 52 yards. Clean sight picture, light, durable, simple, and I have aiming references out to 50 yards. For backup shots, practicing, target shooting, competition shooting, I shoot it like it is a single pin and I never even look at the 2nd pin. For TAC style evens I have 2 extra references to get more range besides using the top pin like a single pin. The gaps between the top pin and the 2nd pin and the level are the same so whatever my double pointer tells me the gap is between my top and 2nd pin, I add the same amount for the level then subtract 2 yards and it is typically really close to where my level will hit. More than accurate enough for goofing around at longer ranges for fun. I have also ran a triple pointer and set one for each pin and the 3rd for the level. But I don't use those others enough that I just went back to the double pointer for myself.
Some don't like the fact that the gap isn't adjustable, but the way it is designed and setup, it is so user friendly for the gaps and the actual distance the gaps are spread apart really makes sense when you start playing with shooting different distances as well as giving you an overall excellent sight picture that is not cluttered up.
I also like my 3 horizontal pin setups as well. Both horizontal and vertical. Both have similarly great features with slightly more cluster but slightly more precision at varying distances. But if I had to pick one for all types of shooting, the double is just a better all-around do everything pin configuration with the way the gaps are and the level and how everything just works well together. Having uneven gaps between the 2 pins and the level isn't as beneficial IMHO like you end up with on other sights with an adjustable 2nd pin or a housing that is a difference size. It's just such a well thought out and designed housing, then you add the MRT rings on top of that and it is such an amazing system.