There are still numerous spreads and mechanics that still work great in present day metagame. Examples of this include “CroCune”, “WhirlRocks”, and “RoarRocks”.
CroCune is a spread for Suicune that has existed for “many moons”.
The spread should look like this:
Held Item: Leftovers
252 HP/252 Def/4 Sp. Atk
The other two are setting up Stealth Rock, Spikes and/or Toxic Spikes and then using Whirlwind or Roar to rack up massive damage on the opposing team.