[Zurai]

Marignon is baaaaaaaad news for Ermor. Huge amounts of priests with good holy and fire magic = lots and lots (and lots and lots) of freshly re-dead corpses. Take them out as early as humanly possible. Jotunheim should be relatively easy for you to take on (well, as easy as fighting giants with human sized creatures ever is), since they only have 2 priests, neither of which is all that accurate and both of which are semi-expensive. I'm not familiar enouogh with Abyssia to say one way or the other.