"In fact, good BLMs should be already pre-casting before the tank uses their enmity pull move."

Tomahawk and Shield LOB have a 3x aggro multiplier. If you're working with low level tanks who don't have their tank stance yet (DF Roulette) then you really, really shouldn't do that. I had some [insert insult here] BLM doing this to me from the wrong side of the room when I was trying to shield lob pull a face in Qarn NM onto the platform...he kept pulling so the face would die before I could get him over to the platform. Was really annoying - you don't get shield oath until level 40 on a PLD.