@Malchivo@MuttonhawkI do think the personality is very compatible with Ilunabar.
Ilunabar thinks a lot about the clash of concepts and is typically reactive to imbalances, at times being chaotic in the face of order, and orderly in the face of chaos. That seems to go along with the mentality described in the war domain.
She also has that hand-off morality where, as said in her CS, she can give someone a vial of poison and feel no guilty when it is used because it wasn't her doing it. It is not exactly like the coldness of Thacel, but that can be blamed on Toun.
She also takes a lot of time observing and analyzing things, that is why both Piena and The Index exits, after all. (
Info on Piena, it might be useful.) Hell, he probably would like to spend some time in her library, considering it probably has a record of most previous wars.
If he was a front-line god of war, to mirror Ilunabar's mentality he would need to be more flamboyant and heroic, and speak like William Shatner, just like the martial arts Diva I have been looking forward to make.
But as a strategist god, he is very similar to how Ilunabar would act. Lots of observation; a constant wanderlust for new things; excuses to keep oneself out of the moral implications of the bloodshed; a focus on good strategy vs brutal force, especially when it means that a small group can outwit a powerful and large one. (Which means a taste for "no easy victories", similar to how Ilunabar prefers to not be too efficient in certain areas for the sake of "struggle" which helps to train skills and ward off stagnation.)
He probably would be against putting muscles and boob plates on armor though, "not useful and sincerely kinda dumb" he says. I blame Toun.