Just to point out, 80/100 and 50/150 aren't really all that different.
252 SpA Alakazam Psychic vs. 252 HP / 4 SpD Carbink: 106-126 (34.8 - 41.4%) -- 68.3% chance to 3HKO after Leftovers recovery
252 SpA Alakazam Psychic vs. 252 HP / 4 SpD Regirock: 151-178 (41.4 - 48.9%) -- guaranteed 3HKO...