Both at current
No knowledge of each other
@DBZ_universe: Mystogan is mystogan (edolas), Jellal is Jellal (normal world). There is only one of each, their separate identities distinguish them.
Gildarts takes this easily.
Before the timeskip, Gilarts>Laxus>Jellal>Mystogan>Erza IMO. In the current arc that order might be a little different, but Mystogan wouldn't go any higher.