Tapping invaders

I only do castles now at night before I log out for the 12-14 hour duration assuming everyone is tapping castles all day to collect nerds. I went from getting 300 gold a night to 2300 last night trying the new strategy. In the daytime I look for burned out houses in invaders towns assuming they are not defending and only hit houses. Trying to log in every 2 hours and deploy nerds immediately so I don't hit the limit and I still get random points here and there from defenders. I not longer defend except my castles to get nerds, so have at my town. I have yet to see a hail ants sign except for in my town. I thought that would have spread like wildfire by now. If only everyone would only attack would wouldn't have to do the log out thing.