Demon Scythe. Not only does it deal respectable damage, but it's also good for getting enemies off of your back if you're a mage; most mobs try to run into you, and no matter where you aim, a Demon Scythe will hit an enemy AND knock it away from you if you're getting swarmed; plus, because of the slow velocity when it's first fired, it'll often hit that enemy multiple times and rack up good damage. Was a mainstay in my arsenal up until just after freakin' Plantera, it saddens me that the Unholy Trident doesn't have the same velocity mechanic that the Scythe does because it's pretty meh without it.