In my opinion, war giant seems op because it has standard status as a 6cc ally with the ridiculously strong effect. Assume there is no other factors than combat, war giant overwhelms other 6cc shadow ally. It has the effect of gargoyle, which is 1 status point less than standard 3cc ally, and can easily determinate non-steadfast ally. If you let it combat with all other 6cc allies, it will win for sure. Time will tell it status will be nerfed. I would say nerf it to 2 attack/ 5 health