I am not on my home computer right now, so i can't check which brush i use atm
But it's usually abrush with a slight fall off so i don't get a hard edge.
I use a Wacom and I use a keyboard with it, i hardly ever use the buttons on the wacom itself.

What i ussually do when sculpting finer detail and such i make a sculpt layer on a lowsubdiv level and rough out the basic shape and size i am aiming for, then i create another subdiv layer with subdiv of let's say 2 and rough in the details, then i go to the highest level my machine can take and do all the fine detailling.