The Solar Fields (Expert Challenge)

The Solar Fields is the fifth mission of the first episode in Prismata. Complete all the missions of the episode to unlock the expert mission challenges. This mission is a time challenge, where the enemy will overwhelm you with numbers after several turns, if you cannot breach first. After the 4th Gunbot Forge becomes online on turn 15, it becomes almost impossible to survive. Below are hints and one opening that you can win easily from.


 *  Victory window message 
 * Even at a price of 30BBB, the Advocate would likely still be massively overpowered in competitive Prismata.

Solution
'' Info: There are a few solutions (varying from 2 openings) to this mission. Only the more economic opening is described here.''