I suppose you could just copy the domain spells as is and give them to either the Red or Grey Mage as additions to what the book shows. The other option of course would be to convert all of the domain spells to the EoM system. That would just be a matter of looking through all the domain spells and matching them with the proper elements (that should take no time at all, right

). I don't have any of my books with me, but I recall that Spiritual Weapon is a domain spell of my cleric of Heironious. I think this would be duplicated with Create [element] Object where the element could be anything, but Force might duplicate the "feel" of the original spell the closest. Either way, the domain spells would possibly not draw from the Magic Point pool? That might give them too much of an advantage over the other sub-classes. Maybe they should just draw from the MP pool at a "discounted rate" something like half-cost? I don't know. Truthfully, I'm not very good at this kind of tweaking.
The Red Mage strikes me as the most cleric like since they have Life as one of their elements and Evoke Life appears to be the Cure Spells. If you wanted to closely model the Cleric, then the Red Mage would also need the Armoured Casting Boon to get rid of spell failure chance. It looks to me like this is not something they should be able to get if you follow the Red Mage class EXACTLY as it is presented on page 25 of EoM.
Honestly, I was hoping for more discussion on the book than what seems to be happening. I really like this book and it has even brought me out of lurker mode because I'd be very excited to discuss the book with others. The more I read through it and study it, the more my "obtusiveness" seems to dwindle, so hopefully I'll get a good handle on it eventually even if I have to just be bull headed about figuring out the nuances myself
I now leave the floor open for discussion.......