Best way to populate multiple MV objects from one text file?

We're prototyping our first FIM 2010 R2 environment and have hit an issue when using the Delimited Text File MA. I have a text file that contains one line of attributes per user. What I'd like to do is use different attributes from the same line to create two custom MV objects (I.e. Member, Account). 

I understand  it is possible to only sync one MV object type per inbound sync, so we're working round this by creating two Text File MAs, and running a separate Full Sync for each MV object type, 

My question is; is creating multiple MAs to populate each object type the best-practice/only approach?