Agreed, air law is the hardest. Performance involved learning information by rote but not as much. The technical exam is very interesting (they are all are really) so, in my book, not too hard.
I was suggested elsewhere in this forum, do the confuser tests at least twice before taking the exams. The confuser is so good it is virtually cheating.
BTW, I might be a bit dense but pages 60 and 227 in the Air Law/Met Thom book do not look right to me.