Wow, Golbez on Elite is craziness. I cleared it, but talk about the closest victory ever, with my team 1 turn from death, and the last hit of CoD's barrage doing the final sliver of Golbez's life. I used a full team of 5* units, and a 6* whale Lightning friend. I originally was going to wait until I finished maxing out Cecil to tank, but after watching some other videos, I realized it's all about blitzing them down, not trying to sustain multiple turns with tanks. I used:
Cloud of Darkness -- Barrage dps w/ man-eater
Agrias -- Full breaker (though it has heavy resistance, I still thought the 30% chance of it landing was worth it, but maybe it wasn't)
Bartz -- Barrage dps (let's be honest though, he spent most of the battle dead, paralyzed, or stoned)
Lenna -- Healer w/ cheer
Tellah -- Support w/ bar-spells
Friend: Lightning superwhale
Video of my kill:
Now to spend the rest of these two weeks maxing Cecil, Garnet, Kain, Edge, and then working on some TM's. Nice change of pace not having to spend all my energy on the event since this one is clear once and you're done.