Primary Target says: "This Strike uses the same multiple attack penalty as your Area Fire or Auto-Fire action but doesn’t count toward your multiple attack penalty."
Punishing Salvo says: This does not make a new area attack, and is treated as a Strike made using primary target."
Emphasis mine.
So my question: Is the Punishing Salvo attack at -5 MAP? Or is it also at -0 like the attack from Primary Target?
Because if it's at -0, I have to say "area attack followed by two -0 attacks against whoever you like least" is a really crazy 3-action routine to be able to do every round.
Yeah that probably needs clarification, the wording kind of suggests at the same MAP as the Area or Auto-Fire Attack, since that is what Primary Target does. But it could also easily be seen as a similar attack but after your MAP has gone up.
Although after thinking about it, the second interpretation is good but not insane. Double Slice is two attacks at +0 for two actions; this is three actions for two attack at +0 plus a weak cantrip.
Maybe not as crazy as I originally thought.