I picked up engineering on my tankadin and it has some really nice things specially the goggles!, the repair bots have saved me a lot of time repairing during my trial and error phase. some of the target dummys for example are nice for pulling patrols. just drop one and go ahead and get in postion and they will come right to you. i know some of the items seem dumb at a glance but they are actually good. nothing like a grenade as an extra aoe stun