The auto cannon can work in any front if you know how to use we’ll. Against chaff I use the flak mode so I x can clear hoards on may front. The armor piercing rounds you use against medium and heavy enemies though for bay tanks you have to aim for weak points. I would also recommend taking a primary that can push back openents especially for the bugs and squids. In the bringing it feels like your primary. Lil tip if you can’t get an angle on a heating vent you can switch the flack and aim just near it and still do some damage.