If you stay between Andheri and Churchgate, you can easily opt for the Andheri bound trains from Churchgate station to avoid travelling in crowded trains. The frequency is very impressive and there are some fast trains as well! Here's the Churchgate to Andheri local train time table:
PS: I do not travel much in the western line these days, so in case there's any update, please inform your fellow commuters on this site.
PS: I do not travel much in the western line these days, so in case there's any update, please inform your fellow commuters on this site.