Typically, in Vainglory, since there are only 3 players a side, it comprises of a Laner, Jungler, and a Roamer. The Laner farms in the lane, the Jungler farms in the jungle, and the Roamer simply supports both players, and earns gold through the Ironguard Contract. You can learn more from the in-game tutorials.
As for how you described, the Junglers and Laners are normally the ones trying to avoid damage while the Roamer, which is the more tanky one, is typically the one in the enemy's...
Posted: Jan 19, 2016