Problem with this approach is that you need to semi-auto your fight that is as you can see you have to manually skip the first turn. It goes fine as long as you have time in hand, but if one's in a top ranking guild, by the time he/she completes 3-4 attacks, the whole sector will be taken. This is still an excellent strategy for GE/ lower league GbG.
Are champions/ rogues effective in colonial era? I’ve been told to switch to heavy units when I age up, but I’m ver used to using fast units against artillery based enemies.