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I suggest taking a break and start later – say around May next year. It’s better to have time off, plus with a good 6 month study plan I don’t see an issue for you to ace it.
I’d suggest focusing on 1 level first 🙂 Yes if you pass Dec 2014, Level 2 June 2015 will be painful but doable, as I’m stating this from experience. Hope this helps!