So one of the downsides of playing Tav is not having a personal quest to follow. However I'm sure I'm not the only one who has tried to RP or imagine a Tav quest tied into the story.
My all time favourite was my Tav Warlock, I manged to imagine a quest that led to defeating Raphael. Seems my patron Glasya caught wind of our favorite cambion's plan to seize the crown. It made all the Raphael interactions more meaningful especially going to the HOH which I don't always do in Act III (I usually let the Emperor absorb Orpheus). I imagined a very convoluted doublecross by Mephistopheles who was sick of Raphael and allowed the crown to be stolen as a diabolical plan to rid himself of Raphael.
The good thing about this was it allowed content in all three acts and culminated in BG. The quest started when Glasya caught wind of Raphael's interest in me she asked me to stay close to find out what he was up to. It completed with his defeat.