Like some (with the exception of the very speedy @CarVac!), I’m between about 5min to never done. 
Importantly, I will usually have a series of images when I’m working that are all shot in very similar lighting conditions (either off-camera flash or at the same time of day/setting). This means that broad-strokes like exposure or overall color rendering can be adjusted on a representative image, and then easily copy/pasted onto any subsequent images (or batches of images).
This way the overall parameters can be pasted, and I can individually modify other parameters as desired. I find that from image-to-image I’m only usually adjusting a few small parameters once I get the first pass done (exposure tweaking mostly - maybe some color work if it’s a different complexion on a person).
The actual application of the adjustments is fixed in RT/dt, but for the most part I tend to:
- Exposure
- Highlight/Shadow compressions as needed
- Lightness/Contrast/Chromaticity adjustments to taste. (I find on my E-M5 the need to pull the lightness down a little bit).
- Noise Reduction (Impulse + chrominance noise - I often leave luminance noise alone).
- Color fiddling
Once I have something I like, I’ll bulk-apply as needed and usually only need to make minor (quick) adjustments to exposure/hightlight/shadows between shots.