RE: arrows for lighter drawweight
Well, you know my philosophy. The less energy you've got, the more you have to rely on momentum. So, I'd say go with an XX78 1816 w/100 gn cut on impact broadhead like the Magnus Stinger. Should be good for about 370 grains total. Not much to brag about, but it'll give her every bit of whomp that bow can deliver without absolutely killing her trajectory.