If there are no pax, or even if there are pax, the speed of whose disembarkation is not critical, or if there are no other conditions which require the rotor brake, then just let it the rotor system spool down on its own - it doesn't actually take a whole lot longer. There's a lot of rotating mass up there and no matter how you try to modulate it, the braking action always feel quite violent and seems to put a lot of load on everything.
I'm sure somebody will counter-argue that such loading is tiny compared to the constant loading on the system when under power with pitch applied in flight and that may be so.