Per situations where you notice plenty of rage , I have FF, Mangle, Swipe, and Lacerate all marcoed to activate Maul. Since Maul is based on swing timer and is not attached to the GCC of the rest of the abilities, having it macroed keeps it up all the time.
I've found it very easy to tank using this metod. Always awesome to spam an ability that you never have to actually activate.
Thisperis