i use engine braking always have and always will, it the crank fails or causes excessive wear to other components its has warranty for that.
I ride twisties all the time although not mountain twisties, but i rarely get out of 3rd using that wave of torque HD's are famous for.
What about the EVO engines? I have an 08 XL883. Is engine braking on steep grades instead of using the brakes ok for me, or will it bust my cams too?