the real question is:

How good are you at using scouts with mines? I use them against CV's with some
degree of success since CV drivers are rarely looking at their screen and will run
right over them if they are left in their path. If you are escorting your team in a dd,
they can be used effectively to disrupt (but not deter) a bb rush. You can try using
them against subs in the right situations.

mines are those pesky little speed bumps that cause a lot of damage if you are
either really good at laying them or when you get lucky. I love laying a few mines
and watching that bb drive right over them. Sometimes they have enough bulge to
take them, and sometimes they don't. And if you have torps, you can finish a bb
that has lost his bulge to a couple of mines.

You just have to be creative and pray that their team doesn't see them and then
shoot them before they can be effective.

A better question is how good are the enemy captains at detecting and avoiding
mines laid by scouts.
You could lay a thousand mines but they are useless if no enemy ships hit them.

There hit and miss most bbs have bulge i only got 10-50 attack points for a mine hit .
you might get an distracted cl or dd. stick to ur guns