I would like to further add that 5th house, 9th house, 11th house and 12th house are very important. Stronger planets placed in these houses without any affliction then one will become sanyasi
5th house is the house of mantra siddhi, sadhana
9th house is house of preceptor or guru or spirituality and exploring spiritual paths
11th house shows the desire to become a sanyasi. it is very important to get siddhi in meditation. this house helps
12th house shows the meditation, seeking salvation, withdrawal from materialistic needs.
Hence i justify that a person having these houses stronger can become sanyasi and spiritual person.
Do not forget to include jupiter and ketu aspects to lagna that makes a person spiritual