Which procedure is correct for mushkil?

Degrees of Indication: Ẓāhir, Naṣṣ, Mufassar, Muḥkam and Obscure Expressions

• Seek evidence and then reflect carefully to interpret
• Selecting just one lexical sense without inquiry
• Insisting on the most common sense in all situations
• Applying only the rules of mujmal and mutashābih