Modafinil is prescribed to reduce extreme sleepiness due to narcolepsy  and other sleep disorders, such as periods of stopped breathing during sleep  (obstructive sleep apnea). Whereas you are using it on your normal condition which by itself you are abusing yourself and inviting trouble. Take a call if partying is more important than good health and happy life. It is better to take off from work and sleep well than consuming Modafinil OR avoid partying and go to work the next day. No professional doctor will recommend you the dosage. It is your call if you want to dig your own grave.