Lowering questions

[mipstien]

I am looking to refresh most, if not all of my suspension. I have owned the car for 6+ years so it needs it. I plan on going with coilovers.
This is just a fun car for me. I don't drive it very often. I want to lower it with the proper parts. I will probably lower it more than most people care to, but I still want it to be aligned correctly. Which brings me to my questions.

If the front coilover has camber plates what parts on the front need to be adjustable to keep it in spec?
What does the rear need to keep it in spec?
Any warnings going too low other than scraping and bottoming out? I use to daily a Spec Miata with Eibach coilovers which are super stiff. Any Info or advice is appreciated.