I'll probably submit a more in-depth analysis later, but for now I'm thinking the ideal spread would be something like:
HP: 75
Atk: 70
Def: 52
SpA: 145
SpD: 80
Spe: 127
Attack is just enough to make Blissey start sweating in fear of an explosion should we give it that. We want to have as much special power on this as possible; given that it only has one STAB with 70 base power on its strongest move, it'll need to have pretty high attack to be a real threat. Speed is just enough to beat Weavile, but below Aerodactyl.
As far as defenses go, decent HP and Sp Def means it can potentially switch into some weaker Fire attacks (especially if SS is up), but it has pretty low durability otherwise.
HP: 75
Atk: 70
Def: 52
SpA: 145
SpD: 80
Spe: 127
Attack is just enough to make Blissey start sweating in fear of an explosion should we give it that. We want to have as much special power on this as possible; given that it only has one STAB with 70 base power on its strongest move, it'll need to have pretty high attack to be a real threat. Speed is just enough to beat Weavile, but below Aerodactyl.
As far as defenses go, decent HP and Sp Def means it can potentially switch into some weaker Fire attacks (especially if SS is up), but it has pretty low durability otherwise.