I'm not even gonna ask how long that took or why even do that...
But well, now you should be able to handle the super hard fights you aren't even supposed to win xD
Wow you really don't need to do that. Just use Jeanne's barrier on her and she should survive just fine. The wargs are 9x more likely to target Lianna and Jeanne anyway, since they're the ones with the most mp (they literally eat mana).
Whenever you get stuck, just have a good look at your skills and items. I'm sure you can come up with a good solution yourself xD