i have the chart and several years experience of tuning all of mine and my friends skis...i believe i can help or at least tell him if a din of 12 will be fine or not enough
If you have several years of tuning experience then without even looking at a chart, you would know that no chart in the world would recommend a din of 12+ when the skier is 165lb - irrespective of all the other variables whcih go into deciding on a release setting..
The only way to get a din of 12+ at his weight is via discretionary settings.
Depending on his BSL - a din of between 8-9.5 would be fine.
Thats the problem - people recommending release settings which are FAR too high for what the skier needs. I refer back to the link which was posted in this thread.
Don't tell people how to or what to adjust their bindings to unless you know exactly what you are talking about, or are certified.