I used to import in Lightroom first and then run through DXO, but I now prefer to go through DXO separately (I start the batch and let the computer run while I go do something else). Same with Lightroom, I start my import and then while Lightroom is building previews, I go do something else. After keywording all photos, I filter in DNG-files and then divide over the collections.
I have a 'dummy' collection set which I copy which holds the collection structure I use most and then just drag the photos to the collection.
With respect to duplicates, I do not have real duplicates, but I do have sequences and sometimes I decide to keep most of the sequence and post them all to my smugmug page. With my Loupedeck I push 3 buttons in a row and I'm in crop mode on the next photo. Move my hands to my dials and adjust the crop. (1 dial for crop size, one to move vertical, one to move horizontal, one for fine rotation). With my left and right hand moving slightly up and down, I switch between the dials quickly. Each of the dials is configured to apply the crop on a push.
I also use the dials for the main exposure setting (exposure, contrast, highlights, shadows, whites and blacks), moving my hands/ fingers within 5 cm I can switch between the sliders quickly.
A short while back I had a driver problem and my Loupedeck was not working, then I really noticed how much more efficient the device makes me when editing my sports photos.