Prue Halliwell:
* Strengths: Prue was the strongest physically, wielding telekinesis with incredible force. She could easily manipulate objects, even large ones, and had a natural talent for combat.
* Weaknesses: Prue's power was limited to telekinesis and she lacked versatility compared to her sisters.
Piper Halliwell:
* Strengths: Piper possessed the power of molecular combustion, giving her the ability to freeze time and make objects explode. This power offered immense control and tactical advantage.
* Weaknesses: While powerful, Piper's power was often limited by her need for focus and the potential to harm herself if not used cautiously.
Phoebe Halliwell:
* Strengths: Phoebe was a shapeshifter, which granted her immense versatility and the ability to adapt to any situation. She also wielded the power of premonition, providing her with vital information and foresight.
* Weaknesses: Shapeshifting required significant mental focus, and her premonitions weren't always reliable.
The Source of All Evil:
* Strengths: The Source possessed vast magical power, granting them control over other witches and access to dark magic.
* Weaknesses: The Source's power was often limited by their desire for power and their vulnerability to the Charmed Ones.
Ultimately, the "most powerful" witch in Charmed is a matter of perspective. Each sister had unique strengths and weaknesses, and they often relied on each other to overcome obstacles. Their combined power and unwavering bond ultimately made them the most formidable force in the world.