With 85 points for the Subclass 189 (Skilled Independent) visa and 90 points for the Subclass 190 (Victoria state-nominated) visa, plus holding an Australian STEM PhD and being offshore, your chances of receiving an invitation are strong but competitive. The minimum required points to apply is 65. for 189 visas, invitations typically go to scores around 85-95+ points due to high demand. The 190 visa adds state nomination points and may have slightly lower cutoff thresholds but remains competitive. Your STEM PhD adds valuable points, supporting your profile's strength. Being offshore does not negatively impact chances as long as other nomination and visa criteria are met. Overall, your score and qualifications make you a competitive candidate for an invitation in both streams.