Judging from reports, Vine's accuracy rate is higher than Yamata's.

Also, I pulled off another unlikely victory. Thunder > Light > Thunder. My Soul (Mordred) died in the first wave (as expected, due to the lag causing my debuffs to expire at an untimely moment), leaving me without any class B debuff, any way to lower debuff resistance, or Black Propaganda. I didn't think I'd be able to clear ANY last boss, much less another Thunder, especially once 4/5 of my ATK and DEF debuffs missed right off the bat. I should really start recording these Sunday runs, as some of them are truly epic.