This is just one of MANY MANY MANY build that can farm raptors successfully. Personally i use a variant of witch, along with the PvXwiki guide can be found on PvXwiki's page about Raptor farming guide. Raptor farming is a fun way to farm, it's VERY easy. It's great for farming Guild Wars event items.
Here's a vid tutorial of it:
As always pleases send Farming tutorial requests to ifarmguildwars@gmail.com
