The problem I always found with Titania was that it was the first trial for level boosters, who often hadn't bothered to set up their bars or learn how to play their jobs. Combined with getting carried through the first two dungeons by trusts, and it tended to end poorly.

Alternately, a tank not picking up the second add. Or trying to take both and getting squashed by multiple tankbusters.

Either way, it was always pure human error.