If Mba is your choice then you have to specalize it in dept like marketing, HR, IT, finance. and ACCA is all related to accounts and finance. and as fas as scope is concern MBA from univeristies like lums, iba, quaid azam have worth other than that it doest have much value provided that you are too much good. and as for acca is concern acca have good prospects than mba.
and if you want to do mba..Then do it from good uni like Lums ,iba , quaidazam.