Ranked 20 in the world black ops!!!!!?

my ffa( by far my BEST game mode)- never lost even when i come in late) i was ranked # 24 in the world as of yesterday but i am now around 35 becuz the boosters and hackers started "ging" after i stopped playinn FFA yesterday..... is 30 something in the world good 30 / 1,000,000 . what is ur highest score per minute rank and in what gamemode, i have made it 30 in the world about 3 month ago tho.