you forgot confuseproof. It's generally worse than berserk proof, because with berserk, there's at LEAST a chance you'll hit that marlboro despite being blind.

Being confused means that Rikku, with her moderate accuracy will miss every single time, and auron, who is inaccurate to all get out with KO her EVERY SINGLE TIME. darkness or not.

Or worse, if you go in there after levelling your strength up at teh monster arena, rikku will end up having 10 hp because of poison, will manage to hit yuna (despite the laws of accuracies) and then die from the poison.

which means first hit=<3 because you give it to someone with autolife and hope you don't have to use it.