just a friendly heads up, there's established sets in the post containing the two mons. Might wanna recalc using those sets; i'm not sure if this Moltres set 2HKOs SpD Lando(albeit you don't need to worry about stone edge anymore :)
Moltres @ Heavy-Duty Boots
Ability: Flame Body
EVs: 52 HP / 200 SpA / 252 Spe
Very simple and self-explanatory. Ferrothorn is absolutely useless to fire, and Lando can't hit him.
However, Moltres must be wary of Stone Edge from Lando - but if they're running a hazard core, I doubt they're running offensive Lando.
Knock Off from Ferrothorn is another thing to be wary of, as Moltres hates losing its boots.
200 SpA Moltres Hurricane vs. 252 HP / 0 SpD Landorus-Therian: 204-240 (53.4 - 62.8%) -- guaranteed 2HKO after Leftovers recovery
200 SpA Moltres Flamethrower vs. 252 HP / 252+ SpD Ferrothorn: 360-424 (102.2 - 120.4%) -- guaranteed OHKO