Thinking about industrial uplift, what can Serras invent that will help?
Industrial replicators. The benefits of these are pretty obvious.
Cheap anti-gravity. This should make transport costs collapse.
Better reactors. Most things consume power.
Better education. Just as she rewrote the book on military tactics, so she can rewrite the school and university curriculums and textbooks. Her technomancy should mean that she can download the information directly onto disk, rather than have to tediously write it out. The rest of the Education: General perks, and possibly the speech ones, would help with that.
Genetic Uplift. Making the general population smarter, healthier, need less sleep, concentrate better, be less prone to addictive or anti-social behaviour, all should be possible, and all should increase productivity.
Cybernetics. If she can create top quality direct neural interfaces that are scrap code resistant (Noospheric or similar ones, basically) and mental augmentation cyberware, that would help even further. She probably needs better medicine for this, but possibly not with all the other boosts to it she has.
Edit: More and more powerful psykers who Serras teaches higher end/more sophisticated Divination techniques to would also be very helpful industrially and economically, as it would make planning work enormously better.
A side thought, but at the moment the Eldar might be very interested in replicators. One of their issues is that Bonesinging should currently be really dangerous to them, as it's a psychic art. The pre-Fall Eldar did have extraordinary scientific knowledge, way beyond that of DAoT humanity, but the survivors don't have the tools to make the tools, etc. Replicators help bypass the issue.
Learning Eldar warptech and psyker knowledge would be a fair trade in return.