What killer wails can also do is:
* Reflect Blubber + Krackens.
* blow up rainmaker shields. (only with damage up abilities)
*Act as a "lazer ring light show" for a squidparty.
and... possibly blow up hiding enemies(effective if you use special up on all gear that you have, and use a weapon that you're Familiar with, that has a killer wail as a special.