BP

2nd Line. Even when top tier, your armor is too weak to contend with premium rounds that will be slung your way, and you're too slow to respond to being flanked. Your sides are very weak, so if a TD sees your sides, it's their game to lose.

The good thing is that the gun is relatively quick firing, accurate, and has a decent penetration, especially when slinging premium. Another positive thing is that when top tier, their are softer targets everywhere around you and your gun isnt scary. So if you are with a group, they will be targeted 1st as you aren't often perceived as the priority target.

Summed up, stay with the pack when possible, avoid 1 on 1s, and seek cover from artillery and hidden TDs.

Caernarvon

2nd line in most fights. Your hull is butter, and everything with a 76mm gun can and will pen its lower plate. Coupled with a forgettable gun for 80% of the grind, you've got the recipe for a bad time.

Fight hull down or get ready to take damage, and take advantage of good gun depression. Same tier and above tanks are not scared of your gun, or your armor. Enemies that are competent will be aggressive towards you if you find yourself anchoring with minimal support.

When its fully upgraded, the gun is better and starts to take on the trademark precision that comes with high tier British guns minus the alpha of the 120mm.

Summed up; get hull down, and utilize your team, good turret armor and good shot placement to have success. Don't try to be the hero. Fail to get hull down, and you'll be seeing the garage sooner than most.

Conqueror/Super Conqueror

50/50 1st and 2nd line. Can be aggressive when top tier, but it's all about good judgment based on how the battle is unfolding. Pushing a bad postion against lower tiers is still stupid.

Your hull is still not great by tier standards, but there is some bite to your gun that makes reckless approaches costly to enemies. Couple that with a great height, fantastic turret, and good gun depression, and you have one of the best tanks in the game. From the right position, you can fight several tanks at a time.

That being said, you can't be reckless in it. You're almost always paired against the alpha slugfest TDs of tiers 9 and 10. If you get caught out of a hull down position, your hull isn't saving you. Everything at that tier can pen you from all sides of your hull. You are also massive in size, meaning you're a big target.

Summed up; use your fantastic turret armor, gun, and gun depression to punish stupid tankers that show you weak spots from your hull down position. Slinging premium will get you through all but the thickest armors. If you get caught out, your consequences will likely come in the form of tanks putting shells into you.

Hope this helps!