That's not exactly a problem anymore with Epic Quests out.I like to shorten this as "farm as much as you can, because the more you farm, the stronger you get."
Just remember not to burn yourself out. Kamihime is a Marathon game, after all.I have not done the math for these, but I'm pretty sure Quetz will wipe the floor with Stolas as far as the passive goes. Technically it's possible to get so much HP from your Grid that Stolas' Def will surpass Quetz, but practically I doubt it.
And while I am here, FYI I've been keeping an eye on your SR MT problem, but haven't commented since I've had nothing significant to say.