Bike fit: Adjusting stem angle vs. height I'm playing with my fit a bit as I have gotten much more flexible since I had a bike fit 2 years ago (+1 to stretching and foam rolling.)

As I'm experimenting with drop I am wondering if it makes more sense to adjust my stem angle going from 0 degree shim to -2 degree or removing the last spacer (~5mm) I have below the stem to adjust the overall stem height(SLAMMED!) Is there traditionally an order of operations for these types of adjustments? 

Should I consider going for a longer stem at a certain point?

Thanks for the help and I realize it might be time to get a new fit but figured I play around with it a bit first.
Assuming you've got a stem of about 100 mm, changing the angle by 2° will lower the handlebars by about 3.5 mm. If you want more drop, remove the spacer first. Obviously the difference between the two is tiny, and probably not perceptible.