Team Fortress 2/pl goldrush

Goldrush is a popular payload map which is so far the only one of its type. Goldrush is split into 3 separate stages, like Dustbowl.

Scout
Make quick hit and run attacks on the enemy. Because the cart heals the BLU team, it's best to go for stragglers. Health packs are plentiful in Goldrush, so use them after you've struck.

Soldier
Firing rockets at the cart and hoping for a crit can be an effective strategy. When the cart isn't being pushed, patrol the BLU's side attack routes and keep enemy engineers from setting up teleporters.

Pyro
Lighting up and running isn't effective as a RED pyro on Goldrush because the cart puts out your flames. You can be very effective when ubered and in between runs you can patrol the base for enemy spies.

Demoman
Placing stickies around the cart as much as possible will help stall it. Discourage enemies from even attempting to push the cart with your grenades. Once your stickies are placed you can go heal at a dispenser or the resupply and just detonate when the cart is being pushed.

Heavy
Jump spinning isn't advisable when trying to take out enemies on the cart. Peek out as little of yourself as possible to minimize damage and retreat if things go wrong. Your minigun is devastating point blank but fairly useless at longer ranges, so always ambush when the cart is close to you, not far away.

Engineer
Goldrush is a very chokepoint oriented map, so playing as a RED engineer is easy and effective. If you think your fellow engies can handle your sentry while you're gone, you might want to get behind enemy lines and set up a teleporter.

Medic
Play defensively, if a teammate goes on a suicide run, don't follow unless you have an uber. If you have the normal medigun it's normally best to save your uber until the enemy is clustered around the cart, then uber a Pyro or Heavy and clear the cart out. With the kritzkrieg, saving your uber is not as important because it charges faster. Normally, using it on a Soldier or a Demoman is the best idea.