Originally Posted by Fat DDRMaster
Although, I'm still not really sure what Substitute helps you do, especially considering the fact that you can't use Intimidate to make it so weaker physical attackers can't break your Sub. Ferrothorn will get OHKO'd by LO Fire Blast and you can always start off by using Dragon Claw mid-game to hit whatever comes in as there aren't many Pokemon that can both outspeed Salamence and resist Dragon Claw.
The idea of sub would be to make setup bait out of Pokemon that rely on status to cripple Mence. Ferrothorn that forgo Gyroball for Thunder Wave or Protect were the main thing I had in mind. You could easily get two DDs if you subbed on such a Ferrothorn's Thunder Wave or Leech Seed and it switched out while you retained your substitute. Ordinarily you'd have to KO Ferrothorn right away for fear of status.
Certain forms of Tentacruel would be vulnerable as well and, with significant defensive investment, specially defensive Jirachi. You'd set up on Bulk Up Breloom too since the sub blocks Spore and his unboosted resisted STABS can't break it. Nonetheless, unless Sub could consistently pay off I'd agree that it's less useful than just going all out with LO and Earthquake. I was just thinking outside the box for ways to get enough speed and power to run away with Moxie.