User blog comment:Observer 39/Your Current (or Future) Fleet Setups/@comment-24161900-20131130000325/@comment-24161900-20131130004657

They're pretty...well, not useful untill level 50, then they become "wtf-op" material. Their op attack will usually 1 shot something, their 1st cannon shot can do up to 50 normal damage, 2nd ditto, end of round torp can 1 shot, then double-attack setup at night can do easily 250+ damage with one shot.

If it's just 1 torp sister + 1 BS, the torp sister can literally sink 4 ships on her own, before night battle. It's so easy.