Ehh...Equipment Certs. (Med, Hack, Engy and advanced forms)

[Doop]

Basically my whole PS career I've been a grunt, but, in my holster lie: A Pulsar, a Lancer, a REK and an empty pistol slot. I have plasma nades fill that up for now, but I've been thinking about getting an equipment cert. Medical has caught my eye the most, because I could be helpful to myself too, I can get rid of the medkits in my inventory.

I dunno. Basically, which equipment cert should I get.