If you don't mind brining over components in new game+ and craft a shielding/enchanted weapon from the get go, then I'd say...
Enchanted Hawkwind 112 39 186 62
Shielding Soulshield EVA 30 MEVA 24
Rush has sky high defenses, mystic/physical resist +5, AND high evade on top of that, plus a decent MATK rating? Of course, enchanted hawkwind is no Nightbloom (aka best weapon ingame hands down), but I'm of the opinion that you're better off giving the Nightbloom to someone else.
Turn 1: Enhance Spells Turn 2: Overdrive, Water Blast X5
lol I always thought some staff or wand in the game has the highest mystic attack, I was going to go with the Enchanted blackjack 194 mystic attack, but I guess the axe and shield looks way better on Rush.