career counselling the most important but sadly ignored idea over here in pakistan I wish i had better career counselling...yar it doesn't matter whether engineering is better or acca you should go for the field in which u have interest in, like what do you like doing or you think you can do exceptionally, if you do that you wont need to worry about being weak in studies because youl automatically study when it comes to interest coz youl enjoy studying about the field you have interest in.... if you don't have it.... it doesn't matter what field you select coz youl get tired/fed up of it eventually.
speaking from my experience..in my final year of engineering ;p but somehow still holding up coz naukri kariniiii haaaa bha.... best of luck choose wisely bro.