Assigning a second sculpting brush to your Shift/alternate brush
Instead of always using Shift as your smooth brush, you can make any combo of brushes to suit your sculpting task. Simply Shift+click the brush in the Brush palette.
Some brush combinations I’ve been using are the mPolish/hPolish brushes Claytubes/Rake brushes. If there is a brush combo that you find very useful, you could record a macro script of you selecting them. Then with that macro you could drag it into your interface or create a hotkey to be able to quickly select brush combinations.
Cavity Mask curves
You can the Profile Curve to gain finer control of your cavity masks.
By adjusting this curve you can get tighter or looser cavity maps or even experiment with a curve that masks off your cavity and high points of your model.