Khorne: God of blood, The Skull Taker, Patron of the World Eaters, portrayed in 4th Ed. by highly effective CC oriented troops such as bloodletters and the Bloodthirster.
Tzeentch: God of Sorcery, The Changer of Ways, Patron of the Thousand Sons, portrayed in 4th ed. by lots of Psychic powers, and ranged attack troops such as Flamers, Horrors, and thousand sons troopers.
Nurgle: God of Decay, Grandfather of Plagues, Patron of The Death Guard, Portrayed in 4th ED. by resiliant troops, plague spreading abilities, and poisonous attacks that wound fairly easy no matter your toughness such as Plague Marines, Plague Bearers, The Great Unclean One, and Nurglings.
Slaanesh: God of Stimulation, Prince of Pleasure, Great Enemy of the Eldar, Patron god of The Emperor's Children, portrayed in 4th ED. by good medium support and assault troops, as well as reducing enemy effectivness such as Noise Marines, Daemonettes, the Keeper of Secrets, and Steeds of Slaanesh.
hope that helps...
