What jobs in the US Army are most likely going to help me become a part of the CIA?

Linguist - Arabic, Farsi, Paki, Pashtu or just about any other Middle Eastern language.

any Intelligence MOS or Special Forces MOS

I had a friend who was in Marine Force Recon, and they recruited him.
A college education is more desirable to the CIA.
Intellegence , sniper, special forces.

You dont choose them ..they choose you
Military Intelligence Branch.

ASA - Army Security Agency.

Special Forces.

You can qualify for a TS (Top Secret) clearance, I presume.

Go to the CIA government web site, you'll find a whole bunch of info to help you out.
www.cia.gov
military intelligence will help.. while on active duty, you can request special forces.airborne and recon and you can take night classes for free on base and be well on your way with in 4 years