Fey Ancestry. Sense advantage on saving throws against being charmed, and magic can't put her to sleep.
Dead-eye. Attacking at long range doesn't impose disadvantage on Sense's ranged weapon attack rolls and they ignore half and three-quarters cover.
Precision shot. Once per turn, Sense can deal an extra 4d6 damage to one creature she hits with a ranged weapon attack if she has advantage on the attack roll or if another enemy of the target is within 5 feet of it, that enemy isn't incapacitated, and Sense doesn't have disadvantage on the attack roll.