If you keep this up, after 4-5 towers or so, you should be able to get a Shiva's Guard. This will help you down creeps way faster as well as give you team fight potential by slowing down the entire enemy team.
By the time you get Manta Style, you should either be winning or have already won the game. This item's main purpose is to help you down towers.
Black King Bar is great if your opposing team has loads of nukers or disablers.
Assault Cuirass is great for more pushing power and also helps physical damage dealers of your team deal more damage when you're around.
Scythe of Vyse is required if your opposing team has a hard hitter that you want disabled.
Your team will distract the enemy team with loads of team fights, while you push 2 lanes at once. This will overwhelm the opposing team and if you do this correctly, you will easily end the game early and get around 600++ GPM.
You can still join in team fights if they're having trouble but your main aim should still be to push as quickly and as forcefully as possible. Unless the enemy team is made up of complete ******s, they will send some people back to defend but they'll realize they can't do anything much to defend and the team fight will turn in your favor anyway.
Dota 2 is a multiplayer Action RTS game. It began as a user-made modification for Warcraft 3 and has grown into one of the most played online games in the world. Dota 2 is currently open for early access and a full release is expected in 2013 for PC and Mac.