Native American factions overpowered?

[The historian]

I decided to take this one step further and tried to play the natives with the new unlock er chose the Iroquois and new France fell in 4 turns Louisiana 2 later, their troops are very very cheap i don't know if it's so for the ai but at 150 for tribesmen and 200 for warriors hell i'll take 20000 and swamp the colonies might even get a dhow fleet up and invade England.
Also their melee is incredible +14 for tribesmen for the attack.
I beat a french army at Quebec they had 3 militia 3 cannons 2 prov cavalry and 1 chassseur de blois i had 4 bowmen the chief 2 tribesmen and 2 warriors, lost around 10% i got close real fast and afterward there was no contest , so maybe their melee should be toned down a little and units made a bit more expensive.