I would say Kouros is definitly the least safe.
IMO it smells just like a urinal cake.
Xeryus Rouge is pretty much the safest blind buy, but thats not saying much. I would NEVER ever blindbuy.
If I could go back 5 years ago to when I first started collecting I would have only bought things that sampled thoroughly and absolutely LOVED and have just a few fragrances that I adored wearing instead of 3 boxes of stuff that sits around.