6-maning Balrog is not a great achievement nowdays (as it has been 3-manned back in old good 50 days anyway), but we were down there on business (hunting for Broken Chain Link for a Watcher run). Good fun!
Still, one thing worries me. With b7 (I think, maybe even earlier) they managed to bug that encounter again. The jumps - which used to be really painful - don't do anything anymore. You can even spot that on the movie - there's a missing part of the animation, Balrog doesn't land, he just appears on the ground...
Also the change to LM that came with MoM (the one that makes them unable to remove diseases/wounds outside their fellowship) could be fatal, especially for non-lvl-60 groups: the Balrog casts loads upon loads of nasty diseases that can only be removed by LM due to the amount of the deadly effects that appear and Glathriel gets affected by them as well. Players can not control her, tell her to move or sod away and if she gets them... well... even for her few thousands morale, they are deadly. I hope someone bugs that!
Unfortunately, you can't see much of me in that film, 90% of the time I'm hidden somewhere beyond Cal's left lower corner, but you can spot me on few occasions.