In Terraria's pre-HM, most Molten/Underworld-tier items are "top tier". Though not 100%, they are consistently among the best items available, and almost always out-perform items of the "Dungeon/Jungle/Queen Bee" tier, the same tier at which Deerclops ostensibly falls. This, any comparison in which Deerclops items fall short of Molten tier items is, if anything, intended. The PRIMARY item which I balanced Lucy against was not Fiery Greatsword, but Muramasa (attempting for each to have some advantages over the other), with the understanding that Fiery Greatsword would typically be better than both.