You've got 15 settings on each, before you start frigging with the spring rates.
What in all f*ckery makes you think you can get that right for A roads, B roads or motorway, let alone track?
B8 struts and good quality appropriate springs might be more sensible for road and play.
Let's face it, what are you going to do, corner weight it every time you take a different passenger? Weigh your luggage whenever you take anything out in it? Can you imagine the amount of winding down you'll need to do if you give Chuff a lift?
Coilovers will corrode and seize - it's in their nature. Struts are simple and fixed, developed for the best compromise for approximately your car on approximately the sort of roads you might typically drive. Good quality items should 'just work'. You know, like your Mac.
Keep It Simple, Stupid.