Personally, from EQ1 experience at least, Mithanial Marr works the best with the troub. I, like was stated as being one of the four active troubs, did not make it into the beta so I can't say it's the same way in EQ2. Quellious was always a good pick but what you'll want to look at more so than anything are that group wide stat and status effects that the individual gods will give you. That, at it's heart, is what being a Troub is about. Being a walking extra 5 concentration slots that occasionally does damage.In my case, lots of damage.
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Loresong Symphonia - 52 Troubador of Venekor
And you thought Troubadors didn't exist. Silly Freeps, get mezzed.