Charm share has been poorly handled, but in this case it's more a matter of mote reactor Charms being one of the biggest problems in the system.
Well, I think that intend behind charm-share was to grant wierd powers of gods or elementals*; and it is just better handled as artifacts like leather bag containing all the winds, except the west wind that Aeolus gave Odysseus to ensured a safe return home. If it was good enough for Odysseus it is good for your' Eclipse.