Well, you know how I think about Layer Routers and that using the Advanced Output to do more than one mapping.
If you have a better approuch to obtain the same result I would love to ear.
Sure. I probably sound like a broken record at this point, but here we go.
I use one advanced output preset where each slice samples the area from the composition correlating to where it is on the stage. I choose my composition size to contain the amount of pixels I need to properly layout my stage. So the composition is specific for each show. The slices are then translated and transformed *once*, to fit whatever the LED processor expects or projected surface requires.
In the case of custom content, this is then made to fit the composition and the layout of the slices that go with it.
In the case of generic content, I use a variety of effects on the layer to get it where I need it. Between basic Crops, Mirrors, Slides, Iterators and now the new additional Transforms and especially the Slice Transforms, I can do most of what I want for the average show. Several effects together make a 'look'. You turn looks on and off by linking the opacity of the effects that make them to the dashboard.
When mixing different resolution content, you can either choose to scale one to the other as you seem to be doing. Or you can create seperate looks that play to the strengths of each, such as screen filling 'looks' for the 4K stuff, and repeated, tiled looks for the 1080p.
Each of my layers will have the same effect stack, so that each look can be used on each layer. Bottom layers will usually be filling, higher layers will add accent footage in specific areas/slices/outputs.
To top it off, I use Chaser and several 'specials' that are generated in realtime, playing off the specific shape of the stage. Think of animated outlines, or horizontal or vertical wipes created from Gradients, that swoop the entire stage. I love me some swoopy swoops.
Only on really big, complex stages, I'll jump to tools like Angelo's Mapper
to save me time on getting the looks dialed in, and recalling them easily.
Using this technique, I'm yet to come across an actual good use case for groups, and generally I think they clutter more than that they open up possibilities. Especially when crutching on using Routed Layers and now Routed Groups to do something that can be done in the comp.
But hey, that's just my opinion, man.