[X] Mixed mage circles, with your battle sorcerers focusing on either attack or raising the capabilities of your forces, depending on their spell lists and personal preference, and the Sathari priests focusing on countering enemy mages.
[X] You have spare braziers, integrate command structures somewhat by feeding intelligence through to the Sathari officers with Legion junior officers acting as liasons and undead acting as messengers. Wyvern patrols will share positional information on enemy movements and terrain, finding the best routes for the Sathari force to decide on where to send their patrols.
[X] Combine war councils completely like a traditional host would. It will give the senior brass some experience working with varied forces, granted you expected the first time this would happen is in Westeros. After working with the undead officers of Queen Namaaru, you don't expect they will have any trouble working around regular noblemen.