Genghis K - why so harsh on fundamentalism? It's not that hard to get the normal pace of research if you have the necessarry equipment (libraries, wonders) while being worshipfull + you get all the benefits of total war. Cool, no?
Getting back to exotic units - the one unit that i used for the first time in serious combat today was the marine. I have never really relied on marines, mostly due to their slow movement. I usually wait until i have armor. But today i was ruthlessly attacked by Americans and had no other choice than to kick their asses back to Chicago with cavalry/marine/artillery formations. So, i guess the marine is an exotic and unused unit for me.
Another unit i seldom use is the dragoon, because somehow i get tactics quite quickly and if i'm in the mood for quick movement, cavalry is what i build.
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"Anyone can win, unless there happens to be another entry."
- George Ade