You're not playing on a micro-pangaea. It's large, boreal. You'll never beat 325 AD on these settings.Should be won before cuirs, I think. Remember, target date to beat is 325 AD.
Keshiks do sound really cool but I cannot think of any Keshik-based strategy that will win you domination here: on a boreal map you'll go broke real quick when HA-rushing, and won't be able to push till the domination limit. Maybe if the goal was conquest it could be fine, but domination seems really tricky. 1-movement units won't really cut it either, so I think cuirs will give the quickest win here. An early engineering bulb would probably be good too, assuming you're not playing with the Romans.
I don't mind playing with the Romans because there is 0 chance to get the first slot with this game. But if I were to chose another leader it would probably be either Louis or Gandhi (both mostly for the Mids + GW and Gspy(s)). Playing this map with a much tougher mix of opponents could be fun aswell. (All warmongers on a boreal map?)