In my testing anything decent for a tune with emissions intact will raise soot levels a lot quicker around town, especially when you have your foot in it all the time because its a blast to drive.
A modest bump in power will only raise soot/mile a little bit, but anything fun to drive will load it up pretty quickly.
I have built/tested over 100 different emissions enabled tunes and anything that makes a big improvement over stock just makes for more regens.
Either live with it the way it is with a small tune and the regens or ditch the emissions.