I was pleased to discover recently that my colleague at SPU Jack Levison is editing a new book series with Walter de Gruyter called Ekstasis: Religious Experience from Antiquity to the Middle Ages.
Their editorial crew is impressive: David Aune, John Collins, and Chris Rowland are on board (alongside several other goo scholars).
For more info see here. If your research or conference fits their subject description, do consider publishing with them. I had a good experience with WdG overall (in the BZNW).