This thread was helpful so I figured I'd contribute...
I read through First Aid over the first weekend of the rotation. Read through certain chapters of it again here and there to reinforce concepts I was picking up in other sources. I probably read the pharm chapter 3 times over all to make sure I was solid.
The one thing I didn't feel that First Aid covered well enough was side effects. Many of the psych drugs (esp antipsychotics) have side effects that are treated with other meds, and it's important to know those. It's also important to know how to treat particular ODs. Otherwise, First Aid is amazing.
I read through Case Files once, not very carefully. I found it a rehash ofFirst Aid, so it did likely solidify some things, but I wouldn't recommend it.
I did Lange Q&A a few days before the exam, and a bunch of Pre-Test in the time I had left after finishing Lange. I thought Lange was worthwhile, and pre-test was decent. Do Lange first if you only have time for one. I also printed off the NBME Shelf Psychiatry and Clinical Neurology sample questions and did those.. and they're free! I like to do tons of questions in the days leading up to the exam, obviously.
The morning of the exam I did a bunch of questions in the back of Blue Prints to "warm up". I had bought Blue Prints used last year, and didn't touch it otherwise, so I don't think it's necessary to buy it.
99 raw
97%ile.
I think I did go a bit overboard, but I had time, and have a hard time stopping my studying early if time remains.