I honestly have no idea. But In ECH you could have Mack just falling asleep or something and then we could carry on, and when Arah gets time to post, he could wake him up. *Shrugs*
All you need is faith, trust, and a little bit of pixie-dust!
“Can a magician kill a man by magic?” Lord Wellington asked Strange.
Strange frowned. He seemed to dislike the question. “I suppose a magician might,” he admitted, “but a gentleman never could.” — Susanna Clarke, Jonathan Strange & Mr Norrell