First, make sure there isn't a minimum DW for bow hunting in your state, I don't hunt, but I know many states have such limitations.
As for arrows, take a look at Black Eagle Carnivore Ultralights... Don't know the spine, but they are rated "30-50" which would be borderline stiff for your wife's set up. I have a set of these, build is 27.5 carbon to carbon, standard BE nock, Vanetec vanes and 80gn points... Arrow weighs 272gn and I get 307fps out of my D350 at 45# and 28.5"
Another 4" of the shaft would reduce the weight by almost 24gn, but I would guess momentum and kinetic would limit you to small/medium game (white tails perhaps), so keep that in mind.
Heavier BHs (say 100gn) will give mr FOC (think my setup is around 10-11%).