To be fair, Klaren DID use a Vulnerary before the trio attacked him. It was simply not enough. Plus, if the mage hadn't decided to proc Undead Fury, he wouldn't have needed the rescue.
But...yeah, I can't imagine Maya being happy about having to heal Klaren from the brink...multiple times (I count the moment where Klaren as down to 1 HP as on the brink)