I know what you meant. It would be easier and smarter to just use 60% water coverage.
Easier for me and furiey.
But the more titles there are, the more need to be used by citys. This effekt can be weakend by increasing corruption, but it will be always an important issue.
60% Water would serve good for a pangäa at 60x60. For Kontinents for example at 80x80 more water would be better. The distance between continents may be wanted great enough for a triere to need 2-3 turns to cross.