Also, I
4/5ths of your post was comparing Gastly to Misdreavus lol.I'm sorry but did you even read my post? I didn't ask for Gastly to raise up to A just because it's a Ghost-type, and with that logic why did I go with Gastly, why not Shuppet or Litwick? they're also Ghost-types but they aren't viable as much as Gastly is. Yes I do understand that Misdreavus is way better than Gastly and that's why I wanted it to raise up to A not S. I don't really want to repeat my previous post but this is the viability rankings which means that Pokémon are based through they're viability and Gastly became more viable after Misdreavus' ban, not that it's used now to replace but because it faced competition from it and that one of Gastly's biggest revenge killers was Misdreavus.
Regardless, Gastly's viability didn't really change with the Missy ban. Misdreavus wasn't an end-all for Gastly and didn't really impede Gastly's wallbreaking ability. Imo it probably should have been A worthy long ago lolAfter Misdreavus' ban the best Ghost in the meta (arguably) at the moment is Gastly, it's not as good as Missy: it's slower by one point and doesn't have access to Nasty Plot, doesn't have high defenses like Misdreavus so it can't play a support role and is easier to revenge, but it's still a nice replacement. With a higher SAtk and a Life Orb it hits really hard and with the Poison secondary typing is gets STAB Sludge Bomb that can deal with fairies, it has access to Dazzling Gleam, Sucker Punch, Energy Ball, Destiny Bond, Hypnosis and other stuff.