I have a player that's looking to play an Archivist, but he had a question I don't know the answer to.
Do the Dark Knowledge abilities stack? For example, if an Archivist5 makes a successful Dark Knowledge skill check, does he get the bonus for "tactics" AND "puissance", or does he choose which when he makes the check?
It seems to me that if they are used separately, it is a rather weak ability, especially at higher character levels. If they stack, it is of course more powerful, but is it too powerful?
Does anyone have experience running or DMing this class?