I think you nailed it honestly. The AI was probably smarter than me too, giving me landmines when I was getting overrunned. Altho I did get like 6 shields active at the same time so there is something up there.
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oh, yeyeye, took me three tires before I figured out the strats. On my first two attempts I naturally gravitated towards the back intending to build my defences outwards but due to how the resource and cooldowns worked there was really no way to gain ground if you dont start with all your minerals already protected.