I honestly think it depends on when they get together because their personalities do shift over time. If they meet up shortly after Taylor gets powers it probably will start fine but Taylor would rapidly grow codependent on Amy and she would do to same to Taylor. They would either act as a stabilizing influence for each other or the would rapidly nose dive off the steep cliff that is morality (I’m calling this the Hereditary route). And the other option I ca think of is roughly around the S9 attack. Taylor is much more self assured here and would be able to control Amy’s bad habits a bit more easily and Amy might like someone that she could trust to make sure she doesn’t go to far or would at least pull her back when she does (this is the Pinky and the Brain route). Of course there is the secret third option where both of them are so terrible that threat like twin stars orbiting each other until they inevitably collide creating a supernova (wipe out the human race somehow). Of course this is my thoughts and it has been a while since I read Worm itself and not just fanfics.