Petrified Dargon Bones are easily farmed by using Bonfire Ascetics in the Dragon Aerie. But that's at the end of the game, I recommend to accumulate enough before a new game cycle.
ANY weapon and build is ok in DS2. And it's now much easier to amass a huge arsenal of fully upgraded weapons + you can change your build as many times as you like (there are more than enough of soul vessels in the game). I got like 30 fully upgraded weapons of various types for my various builds at the end of NG++.Got any suggestions for which weapons are good then? I think as it's a first play-through, I'll go standard STR/DEX/END focussed build, assuming that even does similar stuff to DkS.