Balthier puts a hand on David’s shoulder, because what is there to say to being faced with possibly repeating the death of a friend? Other than, of course, I’m here for whatever I can do.

“As far as we know, that man isn’t here, and Jay wasn’t supposed to be. If there’s a way to save him, this is the best shot he’s got.” Whatever David can do, it’s more than he’d have had.

But if this goes badly Balthier will absolutely use the potions on David first.