My boy Lolibutts keeps giving me grief over my innerwear. Currently I'm using superior MP regen, before that I used a rare MP regen for the longest time.
I did ask on Killian global some time ago and Seikyo (lancer I respect) said MP regen but I'm not sure if he was trolling me.
Might be worth noting I have 0.4% MP regen on both rings and MP regen on my boots. I don't glyph MP reduction either.
Cheers!