LoL you go ahead and find 20 def mats for yourself, using that same time I can find at least 10 to 15 PCs on this server, if you buy them from me at most is 5 def mats for 1 PC/PD.
5 photon crystals sounds fine, I think 5 PDs would be rather difficult to find, so PCs will do fine
P.S. Milla can only be used by female rangers btw, IIRC guys so make sure you have a female ranger, unless you want it as another trading item
Hahaha I was born in China and then moved to Canada back in 2000, I speak English, French and Chinese. Right now I live in Toronto Ontario. So technically I'm also from the eastern side of the planet