Not necessarily, if you run Stockpile Latios won't be able to come in anymore since you can Stockpile on the switch and avoid being 2HKOd:
first hit: 252 SpA Life Orb Latios Psyshock vs. +1 252 HP / 252+ Def Tentacruel: 125-148 (41.1 - 48.6%) -- guaranteed 3HKO after Black Sludge recovery...