[Taqwus]

Incidentally, in such a setup it'd be sorely tempting to try to start something between Abysia and Marignon. For instance, if you can get a fire-3 caster (not exactly easy as the Ashen Empire unless your pretender has it; dusk elders only get 1 random, and even spectre randoms tend to be different) flame bolts at Marignon might be blamed on Abysia for instance.
In the high likelihood that you and Jotunheim both use cold, and both may use some undead, and both have reason to worry about dominance by fire/astral folks, an at least temporary partnership there might be appropriate.