Redundancy is what makes consistent every System Core deck. Being often limited to 1x or 2x for many cards it means that you need to include different cards that do similar effects.
Leela Patel: Trained Pragmatist has the strongest ability compared to the others in the set and Criminals have the best tools to surprise your opponent. With some economy support from Anarch and neutral cards they're the best equipped to be click efficient and to keep pressure on the Corp.
With Sneakdoor Beta they can also fully exploit all central servers.