The two most recent discontinuations are Vetiver Pour Elle and Iris Ganache. Parure was a great one discontinued several years ago. Also Guet-Apens (and the reissue Attrape-Coeur).
I think a number of the Acqua Allegoria line have been discontinued, primarily the earlier ones, but I don't remember which. You could probably find out via a web search. I also believe that the flankers to Samsara, Un Air de Samsara and Samsara Shine, were discontinued years ago. Then of course there are the very old fragrances from the early 20th century which were discontinued a long time ago.
If I were able to add one it would probably be Djedi.