Use your great concealment (13.8km with camo) to position your ship properly; kite and use all your guns, do not park bow in, you won't be able to disengage nor to use your full salvo potential! Prop mod will help you with that, also don't worry, at distance hitting the rear cheek is rather hard, and Yamato has great back firing angles too so more than half of the shells will bounce regardless. Anyway even if they hit your cheek, they need ~400mm of pen to citadel you, so good luck for that. Also don't worry if someone shoots your citadel belt, it is completely impossible to penetrate at the angle/range you are sitting at. After positioning, shoot with god tier accuracy every 26.4s the ship that presents more broadside or a ship coated in 32mm of armor, and get your 200k damage game. Be careful, watch torps and fires.