Pure mine squid is a viable Mine ship build, but very tough to master, any squid loadout is tough to master in honesty.
[We were a clan ship with a teamspeak channel going. Y'won't find better communication than a Brit, and German and two Muricans screaming incoherently at each other while raging over hitting our own mines for the seventieth time.
Sounds like most competitive teams I've flown with and against.
As for open discussion, you'll find it appearing here in this thread
Mine squid can be very effective, a good match up with tar, if you're being chased and tar the enemy well, drop a mine in the tar!
But mostly the squid mines rely on the squid bi-fecta, flying in the enemies blind spots (because you cant take too much damage)
The launcher does not have great downward arcs but gunners can use the projectile arc to shoot quite low!
Practice in a few matches and set yourself different challanges!
Spend match one only flying low, stay below the enemy galleons arcs and find the sweet spot in distance where the mines land well, give your gunners the same practice too!
be sure to have your engineer bring the right ammo for the rages you will use, if you're not going to be in the enemies face, bring lesmok so they can reach the target and use default as a closer range alternative.
Spend the second round up high! Stay above the enemy and force yourself to spend the match holding the high ground, get used to how the mines drop, and just how high you can afford to stay, again mix and match those ammunitions for the situation. If you're bringing the same ammos each time it'll make it harder for you as a pilot to adapt to the ammo, when its easier to adapt the ammo for the tactics.
Spend the third match mixing both around and using the vertical mobility to confuse and disorientate the enemy.
This.method of practice does mean you will loose a lot, but it'll be much more useful to you to learn the guns than trying to "win"