If used water and absolute water are mixed in completely equal weights, what is the juristic ruling regarding Wudu based on precaution?

Classifications of Water: Rules of Mixing & Solids vs. Liquids

• Wudu is fully valid and recommended.
• Wudu is invalid because precaution dictates treating it as invalid.
• Only Tayammum must be performed, Wudu is forbidden.
• The water is classified as impure (Najis).