User blog comment:FairyRaven/Fairy Tail Chapter 324: The One Who Closes The Door, Review and Commentary/@comment-2214433-20130322143654/@comment-84.113.52.218-20130322163001

Wendy tried and FAILED to heal Makarov after his defeat at the hands of Hades. Charla even outright sais that Makarovs wounds are too deep for any amount of sky magic to heal.

And earlier in this arc, when someone said that thanks to Wendy, Lucies life is no long in danger (after Naval Battle) Wendy sais that it was actually Cherias emergency aid that savd Lucy. At this point Wendy already had 2nd Origin and Lucies wounds were less severe than being stabbed completely through the chest, but from the way Wendy talked it seemed that Lucy would still have died, if not for Cherias help (or probably the two sky sorceresses working together).