When adding in a new craft, such as Alchemy, what does everyone think in terms of the best route to go down? Secondary skill or heroic ability?
Is there a perceived route that is better, or more appropriate depending on what criteria? Obviously a new magic school fits in with the secondary skill, but for something like alchemy it can be seen as a specialised craft like master blacksmith or an arcane skill in its own right.
What does everyone think is the intended use for each route? Any guidance for homebrewers based on the thinking process of the designers.
Not just for alchemy, but for other specialisations that could work either way.