Click here to see the weapons dropped off the Lich King. Notice how the DPS caster weapon is a SWORD. Thanks Blizzard.
This is the 10man list.
10man items to note:
[item]51799[/item] (Heroic: [item]51943[/item])
[item]51803[/item] (Heroic: [item]51939[/item])
25man items to note:
[item]50429[/item] (Heroic: [item]50731[/item])
[item]51939[/item] appears to be best in slot, however if you manage to kill 25man heroic Arthas, [item]50734[/item], the healing mace, may be a better option just because of the insane stats on it.