Of course, there are some tasks that would be better before (Noise Reduction) and some better after (sharpening).
Your workflow leaves out a lot of specifics as to what you're trying to accomplish, so I'll just add that I downsize my 6MP images for web viewing and sharpen at the same time through Image Processor. Been doing it for years as far back as CS3. Never have to be concerned about noise appearance. It just doesn't show up and I know I have far more than what you get on that D810.
I utilize ACR's output sharpening set to Glossy Photo Paper/High along with capture sharpening settings in ACR as a dry run to see how it will look on screen at 100% as it will appear in a browser. If the sharpening isn't enough or is too much I adjust output sharpening to Standard or Low and/or if artifacts kick up I go back into ACR and adjust sharpening there with a decrease in Detail and increase to Radius.
You're dealing with a much higher resolution image than my 6MP which will require more aggressive pre-sharpening settings to override downsize softening which is basically what I'm doing above. Another image quality aspect about automating this way is that sharpening will affect color saturation and/or lightness after downsizing depending on how much high frequency detail like landscapes vs architectural buildings.
The only post work I want to do on a downsized jpeg for the web is in Photoshop's Sharpen filter fade blend set to 20-30% but I find I have to do that maybe on one image out of 1000.
I get quite a few comments from posters online saying how detailed my images are so I guess I'm doing it the right way for web viewing.