If I've unintentionally "taken a shortcut", then so be it. I'm already over 100 hours into this project so I can't say as I feel that I've tried to cut corners any step of the way. In fact, the assembly method came from this Popular Mechanics article on how to build a bookcase
On the other hand, every moment I don't have to spend reading a stack of books to research up on techniques is another moment I get to spend time with my family before I'm tasked to deploy, and hence why I ask here. Your Special Forces sword patch tells me that you might understand where I'm coming from.
As it stands right now, I'm looking at a combination of glue, the snipped finishing nails and some #0 biscuits. Thanks to everybody who replied.
The reference to "shortcut" is more of doing the work in a fashion that may seem to be easier or faster. It's a little late now, but for future projects, there are some thoughts to consider. Where you find you might be saving time, it may become time consuming. For example, when the cabinets are installed unfinished, i.e., no faceframe, it becomes a PITA. There are other problems that may be unforeseen. Keeping the cabinet square, and having the face frame end up being placed exactly where intended. There's also aligning the biscuit slots (if you use them...as the article states) on both the front edge and on the face frame. That is easier to do on the bench or floor.
Personally I don't use biscuits. You still would need a mechanical fastener, or clamps, which brings you back to where you are now. At the onset of planning the work, it's difficult to envision the entire project to make each step of it the most productive and efficient.