Answer

No.
Deep dive is a maximum ratio of 8:1. This ratio can not be increased by the use of a certified assistant. 

Advanced Openwater Course Pg. 83 point 3

Q2.

You have 8 students in an openwater course. You plan to do openwater training dive number 1. You also have one divemaster in training, giving you a total of 9 students. Is this allowed having more than 8 divers with you?

Click next to reveal the answer