Try Apptivate (apptivateapp.com)
It's free and have some unique features

Additional to Flux try http://willmore.eu/software...

XtraFinder not better than TotalFinder?

Alfred 2?

Would you mind sharing your BetterTouchTool settings say on Github or somewhere? Looking for more ideas!

Also, have you tried Hyperdock? That's one I can't live without previews in the dock and window snapping with keyboard shortcuts like Moom.