Lvl 1 fries gunners great... Even when protected by WD, seems to do about 50% damage to other units... Waiting on lvl 2 to see what it does. And @Floki would like you to call it by its proper title, Floki clean it with fire gate
I just started upgrade flame gate to lvl 2 and figure out, that you can't rearm during update. Maybe the same as with mines. Don't know, 'cause wasn't attacked during mines upgrades.