When I was younger I would just use Groudon, Kyogre, Rayquaza, Giratina, Infernape and my Level 100 Blaziken, hoping for a super effective or OHKO hit. Now I'm 13, I use different styles.
My Snorlax in HGSS single handedly took down a Regice, Regirock and Registeel, all at my level by using rest...