Empoleon is definitely a threat, though, as once Latias is out for the count and TSpikes + SS is up, you're at a checkmate. Not sure why he dismissed it entirely.
The choice between Starmie and Jirachi is better made by testing both. Jirachi, with Iron Head/TPunch/FPunch would solve Scizor/Lucario AND Empoleon, but would have a harder time against things that take neutral from these attacks. I'd say give both some consideration, test them, and see which does better.
The choice between Starmie and Jirachi is better made by testing both. Jirachi, with Iron Head/TPunch/FPunch would solve Scizor/Lucario AND Empoleon, but would have a harder time against things that take neutral from these attacks. I'd say give both some consideration, test them, and see which does better.