Sworn enemy.

especially since they don't just not care about your chaos, but it's even beneficial for them - for Altus, of course.

...And there wasn't even talk about chaos against mages, only a fool would take Chaos against them...

chaos, amplified by one and a half times.

...If my memory serves me right, chaos isn't a specialized school in the guild of academics, so you can't find many chaos units (unless it's a late-game scenario, then yes)...Loken is right about the "taburetkas" (Stool units), they block archers, the rest is insignificant (I'm talking about the increased damage from chaos).
...And regarding readiness, mages only have a 2% chance of having defense, so in most cases, mages sit without defense.