Shawn is correct...a much higher FOC would improve the arrow's performance dramaticaly. The point weight I use currently on my lowest poundage hunting set-up is still almost 180 grains. My preferred front weight with my 40-42# bows is actaully right at 225.
You also might discover that the 600 series of carbon arrows are a good choice for your wife's set-up. If you can get your hands on one or two, bare shaft tune them to slightly weak, fletch them up, and they should fly incredibly well.
Good luck and let us know how she does this season.
Claudia