User blog comment:Totters15/Equipment farming (notes)/@comment-26082413-20160514171937

Quint Oxygen Torpedoes (O2) You can get it easier from KTKM rather than Ooi, you can craft KTKM with the All 30 recipe(thus saving a lot ot resources)

41cm twin gun mountIts easier doing the weekly world, 3-3(Mutsu drops there and you can get some furniture coins as well).