There's only one archduke, but according to himself, he can beat the enemies at all the three strongholds at the same time, so everything's cool. Calm down, folks.
Oooh no they are commiting the biggest mistake you can do in a battlefield.. is to focusing on Cold Vs the enemies instead for attacking or even defending the duke from the other minor enemies. but no..
but i will give Cold one thing. he is good to fight but.. is too overconfident and doesn't have bodyguards with him at all. too reckless.