getting 4 collectors and 3 archers seems to be the limit for me, the economy doesn’t match the rate of the enemy scaling. I eyed the upgrades to see if there was something ultra strong I was missing and was worth prioritising, don’t think so.
collector AI could use corpse retargeting every X frames to see if they can grab a nearer one killed after they departed.
I’d prefer set slots for defenders, manual placement brings about my autism of pixel perfect diagonal formations instead of a simple line on the wall.