So, I played a 1v1 on Roanoke. My oponent (Sera) spammed t1 arty with t2 flag. I had air superiority and he kind of naval superiority which I was barely able to keep under control with torp bombers. Neither could I use gunships nor destroyers to counter this t1 + t2 spam. Slowly I lost naval completely due to the increasing numbers of t2 flak that protected his ships. So how are you supposed to counter this?
Here is the replay