Gogf
Indescribable
I don't think you're giving the Celts enough credit. They have a nice trait combo, and their musketmen will be able to get Guerilla II along with another promotion. Through in the Charismatic bonus, and they can get Guerilla II and either Medic or an anti-unit promotion.
Their late game gunpowder units will even be able to start with Guerilla II and Woodsman II if the Celts get the pentagon. These would make great choking units in a late era start game!
Their late game gunpowder units will even be able to start with Guerilla II and Woodsman II if the Celts get the pentagon. These would make great choking units in a late era start game!