Sharpening only at 100% view and being careful not to overdo it is good advice for any workflow. The resampling question is more vexed. It's been discussed here on a number of occasions, but IMHO not to a generally agreed conclusion. Jon has stated the opposite view - e.g. here he says "Do not resize in Photoshop by resampling. Never add or subtract pixels with Piezography".
In raising this, I'm not trying to be a smart alec or stir up trouble. I do it because there are a number of folk who have struggled to understand the issue, despite several IJM forum discussions. You've arrived recently and are expressing views that, on the surface at least, seem to be at variance with the stated IJM position. For my part, I live in hope of getting a response to my 100dpi thread.
We're all here to learn and help each other, and any light that you can shed on some of these long-running issues would be appreciated.