I primarily edit groff-, shell- and (small) c-files. I like it to simply search a line make the edit and move on.
All my groff and c projects have makefiles, with 'm' being an alias for 'make'. So a simple 'w' and '!m' will do.
I use 'z' a lot to view portions of the file.
If I need to transfer a part of a file to another file I simly write that part to a temporary file and import it.
There are some situations when I open vi instead. Primarily when I have to escape a lot of characters to make the edit.
Me. Along with vi depending on my mood.