Have suspected this achievement is bugged for some time but after trying to get that last point today pretty sure it is. I’ve had it showing at 17/18 for a long time now and have purchased many of the sylvari armor pieces and event went as far as to blow 25 gold on one of the t3 light armors I was sure I never got and still no achievement. Its a pretty big bummer so just wanted to post in here about it.