It’s hard to make a recommendation without knowing your circumstances. Some of us are blessed and can lock ourselves in a cave for 6 months. Others aren’t fortunate enough and have to use 3rd party materials and cram on top of a more demanding job, family lifestyle, etc.
I went 3/3 December/June/June, but I’m 25, single, and had no obligations outside of studying and ~60 hrs./wk. working.
Agree with the comment above to ONLY use CFA study material once you get to L2 & L3, at least for the EOC’s and practice questions. There’s no other way to pick up the subtle tricks.
A few generic tips off the top of my head:
1) Studied far more than 300 hours. Started reading in December. Finished reading around mid-April. Didn’t work hardly any practice problems throughout reading, just read through them and sought to thoroughly understand. Created zero flash cards.
2) In mid-April, the books became irrelevant. Worked ALL the CFA website practice multiple choice problems, printing and marking up each one afterwards. Started creating flash cards.
3) Beginning of May started the AM Essay exams. Was 45 minutes over on my first attempt. Realized this needed 100% of my focus for a while. I took the 2010 - 2015 AM Mocks, then thoroughly graded each. I then re-took ALL of them to refine the approach. Took about 6 hours total to take and review each. Surprisingly still missed some of the same problems. Created flash cards for these too.
4) The week or so before the exam, I reviewed ALL the EOC’s and blue boxes, creating flash cards for big gaps. Also reviewed my CFA multiple choice mocks and 2010 - 2015 AM mocks. Narrowed down the flash cards I still didn’t know and studied those too. Also took this week off of work, which I highly recommend (I didn’t do this for L1 or L2 and it made a noticeable difference).
It’s different for each person, but the inevitable element is TIME. Unfortunately, we don’t all have the same amount of it freed up. My advice is to throw the 3rd party material, classes, etc. in the trash and do what works for you. You can find almost anything described in detail on this blog, without the need to sit in long classes or fork out more $.
Best of luck next year!