I found standard 200 cup suspension horrendous, in fact I changed to H&R springs and have found them much better and not half as bad as some have said. I've had Bilstein b14 coilovers on my last 197 and found them really nice on most roads, bit soft for track though.
Doesn't 'need' to be mapped if you can live with it, but mapping will help and you'll certainly gain performance, especially in the mid-range. Mapping is only as safe as the person doing the mapping. RS Tuning and EFI are the two most often used on here.
I've just done the outer track rod ends on mine for £13 per side using Febi Bilstein parts from ebay. Even the inner tie rods are £15-20 per side. Just search for part numbers and cross-reference the parts on ebay.
@geraintthomas the resistor is on the bottom right of the radiator (standing in front of the car looking at it). Take the undertray off and slide under and you'll see it. Unplug, unbolt, and fit new one. It's self-explanatory when you see it.
My fan wasn't turning on at all, even with the aircon switched on. I changed the fan resistor and now it works fine. Very easy job, less than 10 minutes to change.
https://ebay.us/m/OXQjZr
https://k-tecracing.com/products/ktr-clio-3rs-clearance-lhd-air-filter-heat-shield-delevlopment-may-need-modding?srsltid=AfmBOoqcq1xE5ASLRXo4dkwPG63qFbPrLzv0tZZpj2QKbdG82j8ilEWm
No reason why you couldn't buy some hoses and make that work.