Swashbuckler + Critcal Hit cards = boring cards. What do?

[Mulet]

So I've got a swashbuckler in a game where I run the crit hit and crit fumble cards.

First, these cards are excellent. Highly recommended.

The swashbuckler has a wicked crit range, and spends his Panache like every combat will be his last. So he mills the deck.

Is it within, or against the rules to award crit cards for non natural 20 critical hits?

[Claxon]

Are you only supposed to use the deck on a natural 20? My group has been using it on any confirmed critical.

[Saethori]

I don't know much about the critical hit bonus decks, but considering many swashbucklers attain a threat range of 15-20, that means a lot of random effects.

I would definitely save it for natural 20s, maybe 19s as well for those with Keen weapons or Improved Critical.