Moiraine post-Finn being just subtle enough to hide the state she is in except on the eve of the Last Battle the EF5 catch different clues about how bad she's doing:
Perrin smelling dried carcass on her: it clings to her skin as if she lied down in a charnel house although he knows she smells like she's always smelt to everyone else. It doesn't even get stronger when he's close to her. It's constant, precise, like something that warps the air the moment she steps somewhere.
Egwene noticing Moiraine's dreams are just not there. She spends her last night hopping from dream to dream, many warded by channelers, but Moiraine's are completely absent. Egwene knows Moiraine is sleeping because she saw it herself earlier, but there is nothing left of Moiraine's dreams anymore.
Rand not getting any resistance from Moiraine. He doesn't know what to do with this Moiraine who lets herself be carried by his will. She barely contradicts him. She's sweet, she's fond. She's so unlike the weapon that took down Lanfear and saved him that he has half a mind to break her so that the shards are sharp again.
Nynaeve being avoided like the plague. She thinks it's comical at first, but then when she enters a tent where she's been told Moiraine was mere seconds ago, she starts to get worried. Moiraine never fled before her in the past. (Nynaeve doesn't know Moiraine is fleeing Lan through Nynaeve more than Nynaeve.)
Mat knows because he was there just after. He knows what the Finn can do. He has experienced it himself. So he doesn't comment, doesn't deliver a wisecrack, doesn't ask questions when they see her in the camp before the Last Battle. It's the most damning evidence they get concerning her well-being.
