What is the best/fastest way to acquire cracked red eye orbs? I'm level 150 and short of dueling other Brotherhood of Blood members I cannot find a way to acquire these. Dueling doesn't appear to be a very good method because it often takes over five minutes to land a duel.
There are several monsters that drop the orbs:
The one that has given me the best drop rate is the Fire Salamander.
Here's a video of someone farming the little Piglets in Majula.
Also, Titchy Gren (The Brotherhood of Blood guy) sells them for 10,000 souls each in NG+ (As confirmed by @miR, burning an ascetic will not allow you to buy them).
Hope this helps a bit.