Oh. A tower just takes away from plunder and allies bonus. Much better to put any other building there if you don't need the tower for wars. In most cases you will end up making more money (again P may go down but AB will go up, more than offsetting the drop in P).
You will end up making more money per hit on most EBs (especially T5 and above EBs).
If you put up a tree, since it doesn't contribute to P, you'll see a much larger drop in P that may or may not be made up for by the increase in AB. However this is offset somewhat by the increase in what you make on steals and other spy actions.
Bottom line for your build, any of the three atk buildings will increase your total gold. Towers will drop it a lot.