this is again a type of these 'how-to-get-from-Accenture-to-Strategy' type of questions, right? (you will find thousands of useful posts here on that topic). My 2cents:
Option 1 quite a tough job to be convincing, esp. with one year younger applicants next to you
Option 2 sounds very promising assuming you manage to get into the right school, but is expensive.
Option 3 quite plausible. assuming that the possibility to do more strat work is available, try to steer in the right direction during your assignments (communicate to everybody!!!), and do loads of stuff next to your projects. i know several people that moved form ACN to Bain and Mck. (you can combine this option with no2). good luck!