Desktop Tower Defense Strategy - Tower Placement
This is an important section because if your towers are not doing their maximum then you can’t win on hard mode because effective placement of towers play a big role, for example if you look at these 2 diagrams:


As, we can see in the first picture the Bash Tower placement is not good at all, because it is not as effective as it is in the 2nd picture, because in the first picture creeps might get hit by the Bash Tower or might not because of the distance and secondly even if they get attacked it will be only once, because of wrong placement, whereas in the 2nd picture as we can see, creeps will get hit multiple times, first while they are entering the puzzle and once when they are inside the puzzle it is very important because in 2nd picture the Bash Towers are performing at their best, not only cost effective but damaging every unit multiple times again and again. So, try to have this kinda picture in your brain when you are creating mazes for optimal usage of towers.