My setup for doing this as Thief was Sylvie, Ygnas, Monbereaux, Joachim and Koru-Moru, in that order. However, occasionally Koru would die during the last 25% when I was running in behind Monbereaux to get his Cover to break Target, even during the Trust Campaign.
I have tanked this a few times as BLU and it is substantially easier than as Thief. I remember making good use of Diamondhide and White Wind, and I do not think that would have been possible without Tizona's MP recovery, especially considering the fact that Aspir would almost always drain my MP. Some Vile Elixirs might be useful in this situation (Is using meds/food considered solo still...?) but I don't remember ever being in serious danger of dying aside from the rare "Interference > Impact > Interference" combo.
There were quite a few attempts where I timed out though... It didn't take many accidental heals to break my focus, but the biggest problem I faced was losing more than 1 trust, especially early on in the fight.