I enjoy a good BLM LB now and then, I just dislike that my character seems lost in thought for eternity after he casts it. It's imperative to position yourself somewhere that's safe for the next 2 hours while your character decides what his next course of action in life is and then writes a book about it because you won't be moving out of the way of anything while he's busy at it.

I'll use the demon wall boss as an example because it's easy and readily available, if you start the LB cycle to quickly drop the adds and you've made the mistake of being in the middle of the bridge when you decided to LB, you're getting hit by something and moving out of it is unlikely. LBs are great, but remember kids, safety first.