I am not familiar with the Alaska-Class. How much armor do they carry?
According to Wikipedia, Main side belt: 9" gradually thinning to 5", Armor deck: 3.8–4.0", Barbettes: 11–13", Turrets: 12.8" face, 5" roof, 5.25 side and rear. They did not have anti-torpedo blisters, but the official pronouncement at the time was that they had excellent internal compartmentation. How they would have stood up to enemy ordnance is a question mark; AFAIK they were never hit by anything hostile.
I confess to a great fondness for the class: I would rather have an extra one of them than an extra Indiana class battleship. Their 33-knot speed made them great carrier escorts and also useful for fast raiding missions.








[/center]


