Change screenshot destination on Touch Bar Mac (macOS Sierra)
As of Mojave 10.14.2 version, you can change "Save to" destination by entering screenshot mode (press screenshot key on touchbar or Command+Shift+5), then you'd see quick tools (region selection, etc). Go to Options -> Save to... -> Other location... and choose desired location for your screenshots.

Now all screenshot (even those you process with quick editor after making a screenshot) will be stored at chosen folder.

And you don't need any specific software or scripts.