I thought it could be useful to always have a spare runner and corp deck at my disposal to show people the game. One that I would never have to take cards from. Of course, the easiest solution for this (until things cycle out), is to use spare cards from a second and third core set. My first attempt was to ignore legality, but based on some feedback I've re-done them to be legal. To be honest, there isn't a whole lot of flexibility here since you are quite limited in card choice. The other thing I was considering doing is not limiting cards to 3 max (so 6 Sure Gamble and Diesel for instance), but I think the results are good enough to not have to do that. Keen to get your feedback on these though. BTW, I've only been playing a few months, but have become quite obsessed with the game.
Thanks for your time.