I will also echo that I used Will of D's guide and can attest that his videos were a HUGE help. His tutorials were realistic and very specific about certain RNGs to lookout for. Although my BP was a little high (62K) I killed all 180 exams. Noteworthy exams that were challenging include exam 140 (where I changed to Earth Main and switched to another tutorial for just that one exam) and 179 where a lot of luck was required. Smooth sailing for the most part other than that. One thing of note: I wasn't level 85 at the time so on my wind main, I didn't have natural draining for the last talent. I subbed for mult-shadow clones as a talent and found it to be a good subsitute if you have the BP but still short a few level from using the prescribed talent.

Good Luck!