To each their own with trusts, but I wouldn't go as far as recommending it, 60 mins of nonstop work to get 2 dungeon clears is a bit too much. It's basically getting a worst scenario DPS party every time you entered a dungeon where you pull most of the weight for the entire party.

Although I imagine there's a correlation between those who don't put much weight in dungeons and those who like trusts, they are already used to slow runs.