Carnage is a great spec. It can put out a lot of damage fast. The massacre -> gore -> ravage -> force scream combo is nuts. Massacre also increase your chance to have an extra attack happen by 30%, which gives you a total of 50% chance for extra attack. 100% crit on force scream. Ravage has roots. As carnage, tear through all the normal and strong enemies first then go to the elites +. You should be able to take down a strong in 4-5 hits like clockwork. Then for longer fights, time your gore right and make sure the massacre proc is always up.