Well, that's also good spell but my ray has two benefits; first being that it's ranged (so not stepping too close to the ghosts) and second minor healing cantrip may not make any impact to girls in such condition (or harm ghosts as it's just 1 HP dmg and they can resist it with a will save for half, which rounded down is 0). While my ray is not cure spell but it heals and is by default positive energy (in raw form).