I depends on how you manage your family library and on your naming convention. On way is to filter by family type name. Or by a parameter value if there is such a parameter in your door families to specify if they are billfold or sliding.
There is a lot of nodes to inspect and organize list
What you have done with List.FilterByBoolMask is a good a way. 
You can try too List.GroupByKey
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Not sure if I am using the “And” node correctly here. What I am basically saying is IF doors with Type Parameter “Remarks” is = to “Swing Door” AND doors with Type Parameter “Type Comments” is = to “WD” then the head detail should be H3/A600. All other doors should have a head detail H1/A600.
While I have your attention, I do have Wood and Sliding and Bifold that will get a different detail. How do I set an exception for those? The Type parameter for the Wood Bifold and Sliding Doors is also “Remarks”.
Thanks!!
Anyone?
Ok- got it to do what I want.
Except there is one more thing and for some reason I can’t figure it out:
How do I get The type parameter of all doors hosted by a wall with a type parameter that contains “X”. What would that graph look like?