My new strategy, plus the “don’t play after defeat” rule works like a charm:
My last battle was hilarious. They went on both sides, leaving a huge gap in the middle where I passed. Unfortunately the gap wasn’t huge enough to avoid a 11.7km Moskva radar. Since they noticed me, they chased me to the corner of the map. 3 of them. A Moskva, a Zao and a Conqueror. Because 3 ships are needed to catch a single Shima in the literal bottom left corner. In the meantime I torped 60K into the BBs.
When I reached the corner, I smoked, turned back and they looked pretty surprised when I appeared 2 km from them full speed. Poor Moskva was the closest and went from 100% to 0 due to a point blank range torp volley.