PhD Admissions

Planning to apply for PhD this year. I have 3 publication but all 2nd author and one 1st author currently in the works and will be in review at time of application. I'm a MS student (T15 in US) with a strong MS gpa and moderate undergrad (T3 in my country) gpa. Planning to apply to ece research area is ML systems and/or how to run ML efficiently on different hardware.

Planning only to apply to T10 unis mostly. What are my chances. Is there anything I can do in 6 months to improve my chances? Should I contact professor now?