I started 10 test games with complete visibility and checked which Guardians the AIs had. Every time with a new seed and a randomly selected planet. 10/10 difficulty.
Game 1
Snipers, Lasers, Flaks, Lightning, Tractors, Zombies
Game 2
Heavy Beams, MRLSs, Plasmas, Shields, Spire Implosions, Heavy Beams, MRLSs
Game 3
Heavy Beams, Flaks, Zombies, Spiders
Game 4
Missiles, Spiders, Tractors, Lasers, MRLSs, Heavy Beams
Game 5
Heavy Beams, Flaks, Tractors, Lasers, Snipers
Game 6
Spiders, Spire Implosions, Missiles, Plasmas, Special Forces, Flaks
Game 7
Flaks, Raiders, Heavy Beams, Gravitys, Tractors
Game 8
Vampires, Lightnings, Plasmas, Raiders, Special Forces, Munitions
Game 9
Lightnings, Missiles, Vampires, Flaks, Needlers, Snipers
Game 10
Lightnings, Snipers, MRLSs, Flaks, Needlers, Special Forces
Results
Flak: 7
Heavy Beam: 6
Snipers: 4
Lightning: 4
Tractor: 4
MRLS: 4
Spider: 3
Missile: 3
Plasma: 3
Special Forces: 3
Raider: 2
Zombie: 2
Vampire: 2
Spire Implosion: 2
Needler: 2
Munitions: 1
Shield: 1
Gravity: 1