Last year Arenanet was accepting internship applications and provided artists with concept art to work from ([link]
Obviously I'm not applying for the internship now because I'm about a year late, lol, but I thought I might as well make it for fun anyway.
Now, the guidelines specified a limit of 3000 tris and the equivalent of two 1024x1024 textures (I'm using 1 1024, 2 512s, a 512x256 and 2 256s)
About 2-3 days work all up.
Edit: updated with better model sheet