Great writeup. Some other items I find handy:
- A rubber/plastic headed small mallet for tapping trigger pins and seating tight pistol grips.
-A jointed arm lamp that will position close to vise. I use a hospital clamping lamp with double wall metal shade that does not get hot. Cheap on ebay.
-Dremel and small files are sometimes handy. I now routinely sand the surface of bolt catch roll pins lightly to ease install.
- And a roll of blue painters tape to protect against scratching and hold small parts in place. Like pistol grip screw to driver.

Tip for newbys- If you start with only one bare lower parts kit there is a good chance you will put the project on hold after a fruitless search for that rocket launched spring/detent. Have spares of everything tiny.

Check local Craiglist for cheap old high quality vises. I have a heavy mother circa 1914 on a second bench dedicated to barrel/muzzle device install. I think I paid $35.