Okay, so after two years playing this game (i've been distracted with other games) I have finally arrived to the final boss. And it broke me the first time. So I grind every member of my team as much as my patience can take. And I still got rekt. I have heard I could use multipotions to heal everyone at once, but I can't find those items anywhere, and I can't stamd more grinding anymore. Can someone help, please?

Been a while, but I do remember it being a rough fight. Want to say I was level 60 something and it is more an endurance test of staying alive through the initial onslaught. I also remember having an ability to heal whole party made it much more manageable, and yes you will be running through your consumables as well.

Which star children has the multiple healing ability? Every unit is level 50 and my main characters 55, and I still don't have the hability.

I want to say Warlock or Astromancer and I think Chloe might have it too. Sorry my memory is fuzzy, been about a year since I beat it. 

Thank you! I hope beating the game this week, so I can finally start SMT Devil Survivor or finish Bravely Default.