What Is The Point Of Leveling Trusts?

[MelodyCrystel]

I for one have leveled almost all DDs plus two tanks with the Trust-system and even toyed a bit around with one of the healers to see how that might go.

Thus, I can tell you from my own experience, that you will usually spend 30 minutes per run in a dungeon that isn't Holminster or Don Mheg (unless you have zero idea how your job works OR if you're a healer who doesn't attack).
->That means, as long as you are paying attention to the instance, it's a save walk in the park; not the fastest, but one you definitely can finish. Above all, you get all loot guaranteed as well as can leave the dungeon whenever you please without having to endure any punishment for doing so.

By the way, I tend to keep my Trust split in what I call the A-Team and B-Team (because that's how I leveled them). Thancred, Ryne and Urianger are my group when I go as DD; Alphinaud, Alisaie and Y'shtola are for the Tank-classes.
->If it wasn't for the ability-pairing of Thancred and Ryne, I would probably prefer Y'shtola. But at least she's my pick for the second DD in case I go healing with Trust, although that's more for fun-runs / loot-hunts.