Talk:World 2/@comment-121.54.44.94-20140309064102/@comment-101.118.93.5-20140320082837

From my experience, to grind 2-3 effectively, you need at least 3 subs remodelled to get the second slot for damage and night battle. In order at least get a B rank, you need to sink half the enemy fleet.

The 2-4 single sub strategy is also pretty much outdated given that ASW has been buffed twice in previous patches. Unless you have extremely good luck, single sub solo in 2-4 in pretty much impossible.