So, I have a filter setup Mechanical -Supply that is set to Blue. If I change the Supply duct system to red and delete the filter then the duct turns red. The filter is what is the top priority.
Now, with this setup, is the Duct System and the Filter battling each other? Is the filter unnecessary?
Here is the general Visibility/Graphics Override hierarchy:
Override by Element
I wouldn't say that they're battling each other, necessarily. The benefit to the System Graphic Overrides is that it is a Project-wide setting, whereas View Filters are per View (which isn't so bad when incorporated into View Templates). The downside to System Overrides is that it affect all Categories of Elements that are connected to that System, instead of just the Ducts and Pipes. In the example depicted in the image below, the left sink is being affected by the System Graphic Overrides due to being connected to the Pipe System. The right sink appears correctly because it belong to more than one system, and no longer fits the criteria of the System Override.
There is no "absolute best" way to do this because everyone has different standards. Personally, I prefer View Filters over System Overrides. One of the reasons for this actually pertains to our architectural clients - when they link in our model, our System Overrides are still in affect and they have a heck of a time trying to figure out what's going on. I'm guessing that since they are using Revit Architecture, they do not have access to the Duct and Pipe Systems in order to remove the overrides.
Great information Corey, I'll take all of this into consideration when setting up our Revit standards.
Thanks for taking the time to explain things.