Based on the IF of surviving this whole incident, then followed by a few smaller ifs.
I think canonical examples are only Damsels, Nehekarans and Tzeentchian Sorcerers, who all had more than faith and skill also a solid amount of knowledge on the matter (two because of long-standing magical traditions to build on, one because God of Knowledge and Chaos cheats)
Maybe research would help, though I wouldn't be 100% certain it would be worth the investment even if we knew it could work.
The problem is even if we could do it we would have to retrain Mathilde from scratch since she has to start on the divine end of things and I don't think that is worth it.