If I was about to go and tune the Clio all over again I would do the following things and in this way:
1. Matched & polished inlets
2. Clio V6 Ph2 airbox & high flow panel filter (do not use KTR, go for Green or K&N)
3. Exhaust (Akrapovič or KTR Performance if you want to spend less and you don't mind the noise) with the decat (the famous "flat spot" that you have with the decat would be compensated with the matched inlets, and on the higher revs when you need the power - you would get it
4. Remap (PaulRS)
And that's all I would go for at the moment.
Forget about the cams - too much trouble, too expensive for a little gain (I actually lost power but I think that has to do something with the tuning experts that were "playing" with the cams & remap).