I think the best way to run Scorched Earth in NBN is to run 2x Scorched Earth, 1-2x Archived memories. Each Archived Memories has two influence cost, so the total influence cost is still below the 15 mark if you run 2 of them. Also, Archived Memories are MUCH more useful in some match ups, and Scorched Earth is frequently a dead card early game, whereas Archived Memories gives you some additional toolboxing to pull back traps, discarded ICE, and credit generators (if you're really hard-pressed for a Pad Campaign, for example).