Hinduism...Which of these weapons are the most powerful?

As per scriptures, the Brahmaastra is almost defined as a nuclear bomb and capable of m destruction. It is not a weapon of Brahma, it is created by Brahma as the most powerful weapon in the Universe. The Sudarshana Chakram and Trishulam are the weapons of Vishnu and Shiva. Both weapons are powerful only when the owners use it. For Eg, in Mahabharatha, Ashwathama could not lift the Sudarshana when Krishna offered him. Similarly the trident could not be moved by many demons. So the latter 2 weapons signify the power of the user than the weapon itself. Brahmaastra could be invoked by warriors, if they know the secrets to attain it. In that context it also becomes the most powerful weapon.