The following custom ruleset exists for Earth 5: (Subject to change by occasional popular vote)
Relics will no longer be static. Relics will be mobile, as with other eras. Relics must remain within 12 travel ticks of a major landmass/continent (North America, South America, Greenland, Europe, Africa, Asia, Australia or Antarctica) Relics will move somewhat faster than on other worlds.
One connection, one player, with no exceptions. Siblings etc will not be able to play this world together if they share a connection.
With mobile relics, those positions aren’t absolutely safe anymore. Of course though, it’s advantageous defensively. Anyone attacking them would become vulnerable. But, on the flip side. Any smart players would immediately isolate those folks and prevent them from ever gaining a foothold on land. Meaning, their only contribution will really be power as they won’t be able to gain much crystals, conquers, or res ops.