Hello and thanks for playing! I gotta say, I did not consider what happened to the apostle after you ascend. Thinking about it now, I would say that in your ascended form, you could probably watch over Darla as she continues her journey to ascension. (Is this the plot of Godspark 2???)
As for the mechanical question, the idea was I did not want you to have to track Life for the apostles, so yes: as long as they don't roll a 1 and go down to zero power, they survived the attack (maybe it missed, maybe it was only a small injury, however you want to think about it).