Halbs (total rape), Cavalry, Monks should rape them.
Pretty sure they will be very underpowered. They are a weaker version of war wagon. Elite upgrade is also horrible.
For my sense, Indians are pretty strong (mb too much, but I need much more games)..
Heavy strong boom, endless gold, Imperial Camels, 300 HP archers + all gunpowder units, including siege eng. (mb this upgrade is too much)
... letz see what the games will show
India isn't a weak civ, just that the elephants are pretty useless I believe.