That's not the point, the ghosts form a circle around the person with the aggro. It's pretty easy to hold hate on Batraal in comparison to ogre, however the (I think) most popular method of tanking batraal currently is to keep him stationary with the tank standing between Batraal's legs so that he is able to avoid all or at least most of the ghost AOE's. However this creates a barrier around batraal that makes melee DD maneuvering difficult.
What you can do to address this problem is to have the tank completely joust the ghosts, by moving every time the ghosts disappear (since they will reappear at his location when they begin the move). In order to do this method the tank's healer has to move with the tank, and what makes that difficult is that when Batraal ~30% starts doing his frontal which has a wide (180 degree) radius the mage has to carefully coordinate his movement with the tank so that he does not accidentally get hit by this (as batraal will sometimes fire it off during the move).
Or it is possible you could just have the tank move enough while minimizing the healer's movement so that they still get hit by 2-3 ghosts, but the melee are free to do damage.
However I rarely see either of these strategies, most groups simply use the stationary tank method because then they don't have to worry about the ghost movements at all really. I'm saying if people weren't able to overpower these bosses and soak that damage as easily, forcing them to joust the fight would be significantly less simple. It wouldn't be the hardest fight ever, no, but it wouldn't be as insultingly simple to execute as was implied in the other thread "tank batraal in corner, kill skeletons, pop circles" (no mention of ghosts which I consider a/the main intended obstacle of the fight).
