That's the link to the build I use on my Vanguard Tank, It is a boss in PvE and pretty decent in PvP. Deffintaly worth a try. I Also have a Shadow, Tank Specced as well. Fun class too has alot of great utility. You haven't really said if you want to Tank or Dps, but It sounds more DPS. I would say stick with your shadow if thats what your wanting.