Thinking of things we can actually be confident of needing for the Waystone research, a better understanding of Enchanting seems to be pretty likely to be useful. This is for two reasons:
1) Waystones are magic items that channel enormous amounts of magical energy, possibly past the point where the density results in a qualitative change in behaviour. So are battle magic grade items. Getting taught battle magic grade enchanting might grant some insight.
2) Both elves and dwarves highly value and respect mastery. It seems likely that their real experts are more likely to listen to what she has to say if she's also a true expert.
Now, developing capabilities based on Windherder is also likely to be applicable as the Waystones channel multiple Winds. AV Enchanting may well also be useful here, as that's another example of high energy magic. Not to mention that according to Realms of Sorcery the Waystone network directly drains the outflow from the many small warp rifts that formed at the entrances to the Geomantic Web network, so there's a small chance that the Waystone network could be a source of AV.