if you're dying it's probably not the build, but how you're playing and your gear. playing solo a lot? maybe be more careful with pulling mobs, and pulling melee mobs to the ranged mobs.
as for if the build is relevant or not, everything is the same, except that the endfeat combo, "Bewilder" now can be applied to raidbosses, so you'll need to include that.
this is the best overall PvE build now:
http://goo.gl/VeDsfN
even for the time I think the build in OP had minor issues distribution of points to spirit and lack of Rune of Grounding, which has use every now and then, but it was extremely marginal.