Vereta's Aura?

I'm having trouble with vereta's aura not working in alliance battles. It wasn't stealing any hostile minions but I was still saccing 33% health. I have my death magic above 4 so it should have failed at all. I was running a mixed build that wasn't based on death magic so I had it at 6. Anybody have some feedback, have the same problem or an explanation/suggestion about the problem then please post.

I have not played for a couple weeks, but my past experience with V. Aura was that it did in fact work within the area of effect, but the minions that you take over do not change color. They do in fact fight for you though. I have verified this multiple times in random arenas. I believe this is a flaw that should be fixed, but until then, is actually kind of a nice exploit since the enemy necro thinks that he still controls the minions.

Now one thing has changed since I last played. The amount of Death Magic you have regulates how many minions you can have. If this in fact holds true for V. Aura as well, then with only 5 Death, you can only steal like 2-3 minions.