Where is the best place to farm White Shade?

Question

I would like to finish White Shade to the bestiary. Is there any other place besides what is pictured below? Killing those monsters is a bit annoying without rapid resp.

Drefia :

Answer 1

I finished those in the place where the Vampire Lord respawns, in drefia (Arachir the Ancient One), here:

I was bouncing between those 3 locations during fast respawn. There's about 8 White Shades there, didn't take too long to finish. 

. 

It was during fast respawn tho..

Comments

I didn't know there were more of them there. I didn't even think about checking this place out. Thank you !