In Warframe: 1999, in addition to a lot of cool new stuff being added to our arsenals in Warframe. Such as Cyte-09, the new sniper warframe and the new Vesper 77 pistol. But alongside all of the new stuff was two small reworks to ancient warframes. One was Nyx, and the other was Trinity. Trinity’s rework was much smaller in comparison to Nyx’s, but it did help her be more viable in activities, albeit not endgame ones. But before we talk about that, let us go over the build I have been using since her rework.

Warframe Trinity Build
Below is the build I have been using for her:

So, to go over a few things, outside of Molt Efficiency, you can use the other arcane slot for whatever you see fit. Arcane precision can help with secondary weapon damage output to help her teammates, the Arcane Energize does not mesh that well when her signature ability recovers players energy rapidly anyways. While a pure Range and Duration build, mixed with a small amount of Strength and Efficiency goes a long way in covering how far abilities affect your teammates, and how long they last. Rejuvenation is there to help with passive health recovery, you can go for Dreamer’s Bond if you see so inclined to do so. With Primed Redirection to health with her shield stat.
Finally, here are the Archon Shards I have been using for her:

Obviously, you can change any of these out as they are mostly there for flavor. But I do recommend keeping a Tauforged Amber Shard to ensure she has decent casting speed, as you cannot fit a Natural Talent on her.
Trinity Post Rework Review
I still feel like there’s a lot that Trinity could have been with a proper rework. Considering Nyx feels fundamentally different to play, Trinity on the other hand just feels slightly better. Her base duration on abilities is higher, and she no longer pauses with ability casts. With her Link ability being just a little better too. But overall, outside of running support for Defense, Survival and other variations of those missions such as Archon Hunts. She still is not recommendable in endgame activities, like your Netracells, Deep Archimedeas, and some parts of Steel Path. I do like that she feels slightly better to use, but I would highly recommend Citrine if you needed an endgame support warframe.