Rules Update: Alchemists & Alchemy

Gus, thank you - fixed.  I always miss that when updating the description, it seems...

Tom - to clarify, this falls under the same skill / effect not being able to be stacked on a given target, as a general rule.

Roger that.

"when it's used"

For the example of a thrown offensive potion- is this the moment its thrown or when it connects?

i.e. Would I say...

"Concentrate Alchemy" then throw the packet and call "16 Fire"

Or would I throw it and say "Concentrate Alchemy, 16 fire!"

It would be like calling a Crit or Flame Shot with a ranged weapon, or a Battle Casting skill with a spell - all of the combined skills are called as one attack, including the skills used and the damage type.  So in your examples above, a Fire Bomb would be "Concentrate Alchemy, 16 Fire!" as the packet is being thrown.  (The other way to think of it is that there is no warm-up or delay to use the skill, so there's no reason to make them two separate calls.)