None.
. I did invest in two small armors but that was it, we had no problem holding them back without systems... didn't even lose any of the overmind defendrs...which btw if there called defenders should maybe kill something every once in a while. There more like fodder at the moment.
!!
NudeRaider -- I have no idea tbh. All I know no human was ever able to solve it, but there's at least a few that beat portal 
NudeRaider -- Zoan
Zoan -- I find it kind of sad that on the same day it was announced AI solved Navier Stokes, it was also announced AI beat Portal, and there's a good deal of people who don't know which is more impressive
Oh_Man -- 01001001 00100000 01100001 01101101 00100000 01101110 01101111 01110100 00100000 01100001 00100000 01110010 01101111 01100010 01101111 01110100 00001010
Heinermann,
NudeRaider,
Zoan