Txurce
Deity
Presuming everything else being standard, map type has a relatively significant impact on Korea, because the Turtle Ship can't enter deep water. A Pangaea map would totally negate this, so I would vote against one. I've enjoyed the Continents Plus maps lately, and they provide a nice balance for Korea, in that it's technically possible to encounter all the AI and CS while never leaving shallow water, but obviously much more difficult than sailing in a straight line. However, you may not have that DLC. (If I recall, others don't need it once a map is created.)