Which is more useful (training purposes), Rush or Monster Magnet?

I know Rush is really good for pushing bosses, but which would speed training up further? Back before Big Bang, my Japanese friend, who was a Paladin, told me that she loved Monster Magnet far more than she loved Rush and it helped training far more than Rush did.

How does that stand after Big Bang? What are your thoughts or feelings about them?



Monster Magnet looks like a lot of fun to play with (not my video, obviously) :

[video=youtube;Dz-EX0TNSdA]http://www.youtube.com/watch?v=Dz-EX0TNSdA[/video]