Heya
I used to farm small radiant shards a while back, im not 100% sure if its been fixed or not, but if it has, ill be removing this.
First, have your imp pet out.
Go and sneak by the mobs, up to where Mograine stands.. NOTE: THIS IS ONLY FOR LEVEL 60 WARLOCKS OR HIGHER!
Now, go very close to the door where the girl comes out, and spam your target button, the default key for that is "t".
When you got her in your target, go to the door where she comes out, snad start walking to the sides while spamming your pet attack key. If you do it at the right place, your imp will go through the door and attack her.
After 1 fireball is shot, call it back and wait for her to come out to you, no mobs will come and help her! Now, you dont want to sleep, so what you do is: DPS her to 40% with a wand. Then cast Curse of Doom, wait 1 min and boom, shes dead.
Easy loot
I will post a video if its very needed.