Evilhomer played Ma Oceania in a MP I was in and thrashed everybody. In the late game he had Seraphs, hordes of iron dragons and tarrasques. He had more gems than the gnomes of Zurich and they have alot of gems.
This was down to Ma and Ea Oceanias main late game strengh, clamming, they can use it to overwhealm the world and reach godhood.
Your main problem Baalz is clamming in Kingmaker has been utterly nerfed, thus destroying Ea & Ma Oceanias late game completely.
There is no way I would play Ea & Ma Oceania in any game where clamming has been nerfed, as it destroys those 2 nations.