THIS BUILD IS FOR THE RAINING GOBLINS CHALLENGE

Basically you have a wall of bouncer blockades around the crystal to hit every goblin and orc.

Only the orcs will even damage the blockades, but they will damage them, so make sure to upgrade/repair regularly

It is possible to make a build with only 9 or so blockades, and still have it work, freeing up 9 DU for a mortar tower or smth, but that's a more advanced strat.

Most of the enemies will obviously hit at points labeled "1", so those will need the most repairing once orcs start showing up

As an Adept, aiming a fire bomb at point "4" will allow it to hit enemies on both paths from the east, generally maxing out your mana-gain from a genie, and also clearing out a lot of enemies