I'm running through the early levels and tracking my INF usage. Swapping reward merits for converters/inf (assumed price 65k each), and selling rare salvage for an assumed 400k (which is pretty standard on they AH last I checked), I have a full compliment of SO's, all green using the auto upgrade button, and almost 3M influence to spare. I stopped selling common/uncommon salvage and recipes at L15, and I'll use them to craft IOs when I hit L22. So far, its been a breeze.
My leveling process has been 1) tech and science origin arcs 2) Matthew Habashy 3) Shauna Stockwell 4)Eagle Eye 5)Midnight Squad. 3 rare salvage drops and 28 reward merits. If I was on live and TFs were running, I'd jump on Posi 1/2 for the merits, but instead I'm heading to Faultline.