So I've really only recently started playing. I've unlocked Battleships and bought one, but mostly I play Cruisers.
Historically, around 1910 admirals found out, much to their horror, that a swarm of torpedoes could blow up even the largest battleships. Suddenly small cheap, fast boats armed with torpedoes, called Torpedo Boats or sometimes Patrol Torpedo Boats, or just "PT Boats" for short, were a genuine threat. Thus was born the PT Boat and another class of ship - The Torpedo Boat Destroyer, sometimes called the "Escort Destroyer" or just "Destroyer."
Now WoWS doesn't have PT Boats. Destroyers fill that role. So Cruisers have to fill the role of Torpedo Boat Destroyer. That makes the game dynamic like so:
Cruisers hunt down enemy Destroyers.
Destroyers swarm the Battleships, launching volleys of torpedoes to blow them out of the water.
Battleships use their huge guns to blow Cruisers out of the water.
Am I right so far?
So in missions usually I'll attach myself to a Battleship, and make it my job to hunt down any enemy Destroyers closing on the Battleship. If there are no enemy Destroyers around then I'll continue along with "my" Battleship until it engages an enemy Battleship. Then I'll engage any enemy Cruisers that are escorting the enemy Battleship.
UNLESS "my" Battleship is playing right. If he is, he'll know to engage the enemy Cruiser first. I'll add my firepower to his, and we'll blow that Cruiser out of the water in a few volleys. Then we can both concentrate fire on the Battleship.
Does everything I've written so far make sense?
So for most of the game my Cruiser will be firing HE rounds. But once I start shooting at a Battleship I change to AP because that seems like the "right" thing to do. But it seems like I'm doing less damage to Battleships shooting a full broadside of AP than if I just kept shooting HE.
Am I playing correctly, changing to AP when I target a Battleship and using HE for everything else? Or shoulf I shoot HE all the time? Or AP all the time?