Davion said:
My character is an alchemist and I've decided he spends a lot of time researching the different strange elements that have showed up. I was thinking that I wanted to take a CO equivalent of Materials Scientist. So when building a building, he might know nothing about architecture, but know that a particular type of granite makes that strongest walls. Or that frogs, when combined with cure light elixirs, make frog flavored cure light elixirs. (Not joking, I poured a lot of money into finding out that recipe).
Personally, I think the skill you are looking for is a conglomeration of several skills.
CSO: Alchemist (as noted by WCJP, an Alchemist IRL is different from what the skill Alchemy does IG)
- Knowledge of compounds, mixtures, reactions, and material properties. You won't know what material is best for a wall because you aren't an engineer, but you could state that Material A is more ductile than Material B, yet Material B has a higher thermal coefficient than Material A.
- Probably better to just take the Alchemy skill and call it good.
CSO: Engineer
- Knowledge of designing and building things, from buildings and roads to ballista and seige engines. You would have general knowledge of what materials are good for what task, such as what wood is best for a catapult vs. a boat, but you won't have much knowledge about amalgamations of materials or any sort of reaction when combined.
CSO: Apothecary
- Knowledge of drugs and remedies. You'll know how to make medicine and that a spoonful of sugar will help the medicine go down. You'll also know how preparing plants and other organic materials will affect the person using them, be it a salve, aroma, or elixir. You won't know much about material properties beyond their effect on living things nor will you know anything about reactions between Material A and Material B when mixed within Solution C.
- Could argue that Herbal Lore also conveys the same knowledge.
As others have noted, per the rules you aren't guaranteed any IG advantage, use, or service beyond the 1 silver per logistics period. Your plot team may choose to use your CSO skills if and when appropriate. But you knew that already.