* Build mushroom towers in strategic locations to encounter monster
  at least twice.
* Clear trees to obtain strategic location for your mushroom tower.
* Clump your towers so all can help each other. Example: Slow Tower
  allows nearby towers to hit more.
* Build ‘Wealth Tower’ to earn more cash to fund your mushroom tower
  construction cost.
* If limited strategic spots, build Level 6 Pure Tower instead of 
  having two Level 5 Non-Pure Towers.
* Place more focus on damage first ~ Pure Tower, and once you feel 
  the monster HP is a too much to handle, build non-pure towers for
  their special effect to reduce the burden. For example, teleport,
  isntant death and plant bomb. This increases the damage per monster
  if there were less to focus on.
* Next, populate the nearby damage towers with stun, confuse, and 
  slow. This increases the shots taken by monster when they are 
  passing by.