Personally id say armor prototype, since it works to my characters strength (that and i kind of have an idea for how the scientist character may act), but in terms of interest and character benefit? Moonlight Ritual, cause it sounds generally fun.

Unscheduled Playdate is also pretty good in terms of early character development, but i dont want to resort to killin the poor thing though.

As much as it pains me to say it, Armor=Playdate>moonlight (if it makes any sense).