Talk:Development/@comment-26082171-20150211161733/@comment-25730832-20150211175010

You can check here for some recipes. (3rd bullet point, 2nd tab and 1st sub-tab)

http://kancolle-db.net/

Although I don't reccomend upgrading them, since they can only be upgraded to quad torpedo and that thing isn't that hard to get (mostly from remodel DD). I reccomend either try getting the quad one instead or upgrading the quad one (use Ooi/KTKM side ship) since it can be upgrade to Quint, which is awesome.