Can Ryba (both goddesses really, hypothetically speaking) be placed in a world abundant and rich in mana/magical energy generation, so that whatever amount they normally drain is patched up by this other world naturally? The "deport" sub-option, alongside the "trapping" and "recruiting" ones that all fall beneath the general "not killing" umbrella.

(Asking more out of curiosity admittedly, given Ryba's gluttonous nature it may be more beneficial for all worlds that she stays trapped or something...)