Strategy Consulting after KPMG Financial Advisory

So I'm working at KPMG Advisory(associate currently but AM in like 2-3 years) in Asia. Our work comprises mostly of corporate finance m&a feasibilities, fin. modelling, fdd etc. I'm a chartered accountant and want to know if I should prep for an mba or any other msc strategy etc. My goal is partner at a strategy firm (only if work satisfaction is high which depends on the assignments.). I'm indifferent about mbb aur b4 currently as my long term goal because if I study further I'll probably have to start from associate consequently raising the opportunity cost. I want to know if I should continue as a CA in the firm and rise thru the ranks or go for an mba etc after 3 years and get in an mbb firm. 

I'm leaning towards the 2nd option as they offer higher pay among other reasons.

P.s I'm indifferent b/w mbb and big4(big4's strategy consulting dept.). I'd go with the highest paying firm.