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I imagine that War Machine snd ballistic Knife would be bad (don't need to hear about instant revive, it's still bad) also I'm sure any of the snipers unless someone says otherwise.
The upgraded War Machine is actually kind of good, as the grenades explode upon impact, just like in Multiplayer. As for the Ballistic Knife... not so much, since the Galvaknuckles don't stack with it.