Legendaries are removed by disenchanting for crafting. As Jay Wilson recently said in his interview, inferno recipes have ridiculous requirements, and going for perfect crafting stats provides a limitless demand for legendary components.
Build for HP, gather some mobs up, tag a few with Explosive Blast to apply debuff, when ready drop a Slow Time, Meteor, Frost Nova, Explosive Blast. Meteor should land with all 3 damage mods and then clean up with an EB and your fav sig spell for casters/stragglers.
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http://us.battle.net/d3/en/calculator/wizard#eYOgQh!UXe!YYcZaa
Build for HP, gather some mobs up, tag a few with Explosive Blast to apply debuff, when ready drop a Slow Time, Meteor, Frost Nova, Explosive Blast. Meteor should land with all 3 damage mods and then clean up with an EB and your fav sig spell for casters/stragglers.