By now you've got a taste what you're up against. Take note that group combination and numbers do matter, as you can often do these battles with two people, but an Engineer/Dreadnaught combo's battle can go differently than the Assault/medic combo. Going in threes is usually a safe bet, but be mindful that some spots have more active extra spawns that can randomly join in the fun. Make sure you get a few upgrades when handling the Light Thumber battles.
Specs: AMD Radeon HD 6800 Series 1mb Intel Core i5 CPU email@example.com (4cpus) 6 gigs of ram 42" HD Toshiba tv (main) Alienware 21" HD flatscreen (secondary)
Game is running on High graphics settings. Bloom, Exposure and Distortion effects were the only extra options turned on.