I think it's just as Kes said in "Caretaker", that Ocampians had extraordinatry mental abilities but forgot how to use them due to being care for by the Caretaker.
Susperia was there when the Ocampans still used those abilities, so I believe the ones that followed her are the decendants of those that still used them and Susperia never pampered them in a way that would cause them not to use them anymore. Plus Tanis said Ocampians are psychokenetic, so like the Phoenix whatever you think you can do, you can. Tieran was able to access her powers in "Warlord" because unlike Kes, he didn't fear them. He enjoyed such power, so he emersed himself in them.
I don't think Tanis enhanced them or dominated her. I think he only showed her the abilities she had in her all along. Tanis & the alien in "Persistance" both said she was more powerful than she knew. So Kes was a little girl with the powers of a God.
Susperia was there when the Ocampans still used those abilities, so I believe the ones that followed her are the decendants of those that still used them and Susperia never pampered them in a way that would cause them not to use them anymore. Plus Tanis said Ocampians are psychokenetic, so like the Phoenix whatever you think you can do, you can. Tieran was able to access her powers in "Warlord" because unlike Kes, he didn't fear them. He enjoyed such power, so he emersed himself in them.
I don't think Tanis enhanced them or dominated her. I think he only showed her the abilities she had in her all along. Tanis & the alien in "Persistance" both said she was more powerful than she knew. So Kes was a little girl with the powers of a God.