Hardcore as in the game mode or just people that play TDM a lot?
If it's the latter than I run UAV/Sentry/Guardian. A
If it's the first than Sentry/Guardian/Lightening Strike. When you get on a good roll you're going to get all of them. Sentry Gun + Guardian is a nasty combo. --- There is no pleasure in life. There is only a relief of pain. We have to suffer to be on top.