In argument the properties of the Leprechaun are often elevated to those of the divine. That surely goes beyond your categorisation.

If Leprechauns are small visible green irish men then they are not strictly unfalsifiable even if they do have miraculous yet sub divine powers.

Your adherence to their use is therefore for the purpose of ridicule.

Your appeal for multiverse is at base naturalistic and materialist...well leprechauns are little Irishmen...what can be more naturalistic than that?

God is perfectly reasonable within Thomistic philosophy since He is an explanatory for a universe with change.