Does history operate linearly or cyclically?
Line or wheel
A flood plus a last judgment is not the same clock as kalpas, or as Ragnarök, or as extinctions. Group by the kind of time the record actually uses.
Toward judgment, restoration, or renewed creation
Repeated cosmic / cosmological cycles
Successive worlds or a world-ending with a sequel
A flood, then kingship lowered again
A break and a second beginning in the Sumerian King List. Not a last judgment and not a kalpa wheel.