I'd probably recommend -
Lanka + Yomi
Hinnom + Abysia
Sauromatia + C'tis
Fomoria + Atlantis
Ermor + Ulm
Caelum + Niefelheim
Kailasa + Agartha
Caelum + Van/Hel
Arco + Pan
Tir na n'Og + Marverni (or one of the heims?
)
I dunno, maybe something like that?
And I might be interested.