Any raid that has half-decent DPS can do this, without ignoring the adds. First time I saw it done was a week after ST was released. Now, I'd say about 3/4 of the runs I'm in kills him before we have to jump away. Only about 1/4 of my runs kill Scylla before daybreak though. People at really rather dumb when they have to move and deal with simple mechanics.

That being said, I rather dislike the "ignore adds/mechanics" mentality that seems to be cropping up more and more on certain bosses in ST. Can't tell you how many times I've been silenced on Amon because some party is full of melee who can't be bothered to attack anything other than the boss.

"I need to be #1 on the aggro meter, I don't have time for mechanics"
Same goes for filling circles on Xande.