The only thing that bothered me was when you claimed that the crit against Piloswine was so game-breaking. I'm just estimating, but could Piloswine really live through an X-Scissor and then a Close Combat? I haven't run calcs, but Close Combat should do roughly the same as a crit X-Scissor, and that was nearly a OHKO.
If he had used Close Combat, the Def drop plus the increased BP on Avalanche from getting hit first would have OHKO'd Pinsir. X-Scissor on the Avalanche would barely have let Pinsir survive. X-Scissor non-crit followed by CC would have killed Piloswine, but he was switching out to Relicanth either way. If Piloswine HAD stayed in, Relicanth would have come in for free and OHKO'd Pinsir anyway.