For the new game plus- just get yourself a persona that's immune to fire and physical, and you're golden. It's not hard to do at higher levels. I've got one persona right now that nulls Physical, Ice, Lightning, and Darkness (it was originally weak to dark, but has Null Dark from fusion), plus Maziodyne and Elec Amp, and a crapton of buffs. Friggin' awesome. I still died twice last night, the second one killing my evening. The first enemy I ran into I had Thor on (weak to wind) and one enemy spammed Magarudyne before I had a chance to go. No sweat, restarted, found an awesome
ring in a chest for Chie- halved HP cost for physical moves- God's Hand for only 54 HP? Yes, please
. And then an enemy got the drop on me, one of 'em mind charged, another enraged me and two other members of the party (I think Yukiko was the only one who wasn't), and then I got Bufudyne'd do oblivion. One shot, seven hundred-some odd damage. I don't even think it was a mabufudyne, which raises the question of why my teammates didn't take the hit. Y'know, seeing as how I've maxed every single one of their S-links besides Naoto (and the game really does make it easy for you to raise hers- she wants to hang out like every single day, which is good because I've got absolutely no other S-links I'm working on. Not sure what I'm going to do with my time once I max Fortune. Maybe go back to Temperance, which has been at level 2 since...May? I need to improve on the number of S-links I get next time around.) So a good two or so hours of progress, 1 rank in Fortune, and that friggin' awesome ring for Chie was lost.
And Yosuke really needed a few more physical moves prior to getting Brave Blade. My primary problem with him was that I burned through his SP, and Brave Blade really helps with that.