For starters, you're playing TFT; RoC is where it's at.

Err, it all really depends on how you and your teammates function together. You can't go running off by yourselves because you're going to encounter all of the enemy's units all at once by yourself. 3v1.. not good odds. I don't know too much about TFT so I can't really help you there. Any help you need with RoC?