What cards are worth carrying around all the time?
As I finally organized my upgrade cards I realized there's no way I could even use many of these. I have tons of duplicates that may as well go in the same box as my million extra tokens.
In order to consolidate a bit and limit the number of cards I have readily available, I looked at every list submitted to X-Wing List Juggler (as of Oct 21st 2015).
I ran some scripts to process the data and ended up with a list of cards and the maximum number of times they are used in a single list.
Note: The data from list juggler isn't 100% accurate. It's user submitted, and there are multiple uses of unique cards. This is a good reference but not a definitive list.
Here you will find the total times a card has been used in a slot.