I tried the game out for the first time yesterday evening and was very impressed, if a little overwhelmed.

An initial question - me and about 50 other guys were trying to capture a large base. It had large orange shields protecting it which we were unable to pass through, and we were reduced to trying to fight our way through a tiny side door, which lead to a slaughter. How should we have resolved this?

I know that there's a shield generator, but that seemed to be in the building behind the shield itself! Should we have flown into the top of the building, or used light assaults to jump up and disable the shield?

I am an infiltrator. I apparently can hack things. What does that mean, and should I have done it?