Hmm, I don't know, but what about Thunderbolt? If your lucky with accruassy, then you could go for Thunder and Fire Blast. Keep Confuse Ray, because...I don't know, but just keep it. Get rid of Safeguard, I think it's just a weak move. If you have it, instead give it a Lum Berry. Plus you could always go fer Psychic I think. Is this battle with just 1 (one) Nintails?