From what we know this strategy appears to be unreliable. It has too many drawbacks:
1. Every first level of each affinity will make your explorers immune to alien attacks, so it will not slow down the exploration.
2. Harmony can easily negate it.
3. We dont know if the fence protects from Siege Worms, but even if it does it has to be built first. In the meantime the can attack you easily.
4. You will get bad relationships with other civs.
5. Experience is not that important now that everything it gives is just a small power boost. The real power lies now in the Affinities, so theres now no incentive to slaughter poor aliens for experience.
6. You may simply run out of aliens in your vicinity before the grow hostile enough.
So this strategy wont win you games it just makes everybody hate you. Theres however a reason to prey on aliens in the early game: They give you science with Scavenging virtue, which boosts up your technological progress a little bit, but it has to be done carefully and is actually not necessary, but its a good starting option for an aggressor, but in the late game it will lose its meaning.
1. Every first level of each affinity will make your explorers immune to alien attacks, so it will not slow down the exploration.
2. Harmony can easily negate it.
3. We dont know if the fence protects from Siege Worms, but even if it does it has to be built first. In the meantime the can attack you easily.
4. You will get bad relationships with other civs.
5. Experience is not that important now that everything it gives is just a small power boost. The real power lies now in the Affinities, so theres now no incentive to slaughter poor aliens for experience.
6. You may simply run out of aliens in your vicinity before the grow hostile enough.
So this strategy wont win you games it just makes everybody hate you. Theres however a reason to prey on aliens in the early game: They give you science with Scavenging virtue, which boosts up your technological progress a little bit, but it has to be done carefully and is actually not necessary, but its a good starting option for an aggressor, but in the late game it will lose its meaning.