S/D is amazing. It’s the most versatile build we have that can fit and perform really well in almost all situations. It’s primarily skill based so a pretty high ceiling. Best thing to do is to balance survivability with damage with S/D because you are all about sustained damage, not how fast you can burst.
I am using Dacromir’s build, which has been working for me great. Here is he link to it.
http://wiki.guildwars2.com/wiki/User:Dacromir