Trying to make blood broth since the August 2007 update, I went to Nue's tower's entrance to Pso'Xja like I used to before. With /THF, none of the Maze Lizards dropped the blood, but the {Too weak} Diremites dropped an average of 1.5 bloods each. Most often 2, sometimes 1, rarely zero.
The only problem is the long (15 minutes) re-spwan times.