Kingdom Rush Frontiers

I use the map Ma'qwa Urqu, the map with a volcano in the middle.

I put some barracks at the top of the map where the enemies that throw darts come out, improve the barracks to templars and improve the holy grail to the maximum so that they do not die with a little luck they will survive 5 times in a row and the achievement will jump, I'm late more or less 1 to 2 hours to get the achievement.