Cleaned up the Heroic text, Hellfire's mechanics were referenced in multiple places in the text (aggro, de-aggro) so now they're in one. A whole paragraph describing how a paladin's Divine Shield is a temporary de-aggro is more apt for a page on Divine Shield. Not sure if the paladin tanking paragraph should be in there either - stance dancing warriors can intercept and taunt, and feral druids can feral charge and taunt. Tanking fundamentals or important strategy element, a decision I leave to persons wiser then myself.