At the time of that recording, Hamman 2 was picked for a combination of ASW, AA, and buffing the flagship survivability. High ASW with Hedgehog charges will take out enemy subs. AA is to assist in dealing with enemy planes. Only the flagship portion of Skill 1 is used for flagship damage mitigation, as the entire point of the chosen CV/L is bullet clearing + heals. Skill 2 is mainly for personal damage mitigation and AA boost.
What made you pick Hamman 2
At the time of that recording, Hamman 2 was picked for a combination of ASW, AA, and buffing the flagship survivability. High ASW with Hedgehog charges will take out enemy subs. AA is to assist in dealing with enemy planes. Only the flagship portion of Skill 1 is used for flagship damage mitigation, as the entire point of the chosen CV/L is bullet clearing + heals. Skill 2 is mainly for personal damage mitigation and AA boost.