411A, for me that would almost work. However, I Find I have to do: 3 x (ALT/1000) + 20. The beastie is a little slippy below 260 kts or so. Failing that I use Vnav and fistfulls of speedbrake.
Another method I was taught is 3 x pilots age + inside leg measurement of the most junior hostie. One can get into serious trouble before the descent checks are finished though.