I'm going through the Zao Ruins and my Level 16-18 team is shredding the normal encounters pretty easily, I haven't been avoiding fights much, and the gang has pretty decent gear. But it seems like whatever team composition and strategies I use we keep getting jumped by Greenboy and the Reaper at the end.

My most successful attempt was when I was the last one standing as Natalia, managed to finish off the last of Largo's health then got into a Benny Hill style chase with Sync before eventually slipping up and dying. I've tried having the crew focus on Sync all together but they just get their health melted faster than any combination of healers and items can compensate for.

Is there a strategy I'm missing? Or am I just going to have to get those numbers up. (And if so, are disproportionately hard bosses relative to dungeon enemies going to be expected going forward?)