Maha Sudarshana Homam is performed for the purpose of gaining victory, health and wealth. Sudarshana is the personification of the discus held by Lord Vishnu. It is representative of the all-pervading Cosmic effect. Sudarshana is one of the ’wrathful’ deities and is invoked along with Narasimha for protecting the spiritual aspirant from all negative forces that may be at work disturbing the lives and their dharma practice. 

शान्ताकारं भुजगशयनं पद्मनाभं सुरेशं
विश्वाधारं गगनसदृशं मेघवर्ण शुभाङ्गम् ।
लक्ष्मीकान्तं कमलनयनं योगिभिर्ध्यानगम्यम्
वन्दे विष्णुं भवभयहरं सर्वलोकैकनाथम् ॥

Who should do this Homam: Maha Sudarshana Homam is performed for the purpose of gaining victory, health and wealth. 

When you should do this Homam: Can be performed as per star signs any day , however recommended to do the on a Pournamior Ekadasi  Saturday.

Benefits of this Homam: This Homam benefits by providing victory, courage and prosperity. It helps  in bringing good  health, happiness and removing obstacles and also protects from evil forces and black magic.