When I used Juggernaut in the first my answer to the noob taunts was always "Why do you use stopping power? One less bullet to kill. So how does making it one more make me a noob" then i get called a fag
As for thermal, like ecg said use cold blooded then, someone using steady aim dont stay still, someone using sitrep, laugh at them. someone using commando plus tactical knife and a care package marker use aa12 or dual akimbos. Also ecg, like previously stated use the ump 45 as it only seems to suffer in range not power. or p90