Well, I suggest you have a Gang of Hudlooms and that you are commited (I think those aren’t a problem for you at this point). Those make challenges pass from 50% success to 60%. I also suggest you bring 2 or 3 Brass Rings, the more the better. Oh and, if I remember quite right, bring some uncanny incunabula to get some unique items, but for those I’m not sure.