How do YOU save MP?

I never had to use MP pots on my Witch. Literally, ever. About the only things that would make me use one is the long solo boss fights, like Isadora, Vangelis and Ryku. When full clearing King's, I'd sometimes consider using one. Instead, I'd just wait a couple mins and resume. I've yet to use any more than a few MP pots on my Battle Mage, even doing King's runs.

I have THOUSANDS saved up on my Witch. And my Battle Mage has a few hundred saved already, as well.

I can maybe understand more in hellish places like the Temple (long solo boss fights), but you make it sound like you're going through crazy amounts. Do you get hit a lot or something? I assume Underfoot = Aphelia? What about Shallow Keep is giving you trouble?

If you run low just spend some time farming Behemoth maps for Wine.