Just soloed the last boss of the level 100 MSQ dungeon after the rest of the party died all at once. Whew, what a rush! Got three comms too. :3
As a follow-on, a general pattern I’m seeing in the Dawntrail expert dungeons is that someone will express uncertainty about mechanics, someone else will say they know the fight, follow them, then the person who claims to know the fight will die. These dungeon bosses are just plain hard! And I’m not going to claim I know any fight until it’s become truly routine for me.