Psyche isn't a problem, really. It's got a Rating of 6, so 5 weeks time. At Threshold 2, you'd have to use it in week 1, 3 AND 5 to risk addiction. How often is that going to happen? Cram has a rating of 4 so 7 weeks, but a threshold of 3 so we're talking week 1/4/7 to face a test. But let's say you use a lot but game the system enough so you only face a threshold of 1. As Psychological, you likely have 11 dice, that's 2048/177147 odds, ~1/86. So once every two~three runs you'd take a test at those odds, which means you have an average of 200 runs or so under your belt when you fail it once.