I tested it out with the newest version currently aviable to downlaod, I used sword rain and a ew others and they worked no problem for me in that save file. I also tried using them at the boos and had no problems either. Sorry couldn't find anything.
Oh right forgot to set a switch, it should be fixed now. New patch who will fix a lot of stuff also comes out today.
Yes you only need to get 100 or 125 reputation to unlock the quest for it, so its possible but not the "Common" route I would say.