what can I do by Indians when Camels are not useful in team game

I like indians for their cheaper vils and good camels.

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Yesterday I played Indians, and enemies are Aztecs, Goths and Britons. Yes, they didn't use Cav, and I confuse what can I do.

I used C.A. and anyway I won because of my team Franks(real insane mass paladins)

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So I wondered what is best choice in this case.

Training C.A. is good choice or are any better choice ?