Due to vanilla dialogue filtering, all TR Morag Tong masters can hand out vanilla writs and reward you for their completion as long as the related topics are available. It doesn't work vise versa and would require adding a lot of new dialogue in all TR writs.
One of the "little secret" entries in Andothren was about how unusual it is for the local Morag Tong Master to be a woman, and sarcastically talked about how she is a role model for little girls to be the leader of a murder cult. Not only did this make it awkwardly about gender, when even vanilla has a female MT Master and TR will have more in the future, it also cast Dareni Dulo as some kind of "girlboss" character, which isn't (and shouldn't be) backed by any other interaction. And the cringy "Diversity win: More female war criminals!"-joke just further exacerbated that.
A questline that involves murdering people with the Ebony Blade.
Summary:
A priestess of Mephala (a talking Dridrea) found in a Morag Tong hall [somewhere]. She recieves requests from Mephala (as an oracle of sorts) and she relays those requests to the player (or the player shows promise and is trusted with carrying out these deeds). The quest is essentially the Morag Tong equivalent of the Bal Molagmer and Imperial Cult Oracle Questlines.
I think using some of these helms to spice up Morag Tong halls and memorable assassin npc's on the mainland would be nice. A few, like Xeno's helm and some others, could probably see more generic use as chitin variants or netch leather variants. Yes, permission was acquired, according to Ruffin all his assets are open perms.
A nine-writ series of fairly direct vanilla-style Morag Tong quests intended to encourage the player to explore the many locales of the Dominions of Dust release, as well as the west bank of the Thirr. The questline is formatted in four pairs of two writs, with a final writ at the end.