If DoTA2 is anything like LoL, then the number 1 basic rule is objective play.
towers+Roshan. running global gold is a surefire way to make sure your teammates are fed enough to withstand a teamfight or be able to contribute. A 5 hero roam strat can help if you can all force lanes pushed and then turn around and catch counterpushers out of position. but if you have the teamfight advantage, force a teamfight or 1 3 1 push and push the objectives as hard as you can without feeding kills.
note: LoL related, im not experienced enough with dota yet to make educated replies.
Edited by FranBunnyFFXII - 3/3/14 at 9:56am