Keep the timing low, start with 93. Check spark plugs as you go. Detonation/pinging will leave little specs of aluminum (piston) on things. Sometimes.
Based on your questions and concerns I'd contact your engine builder and have some conversations regarding what you should do and how he can help.
Early tuning on a new engine can be tough and inexperience can lead to costly mistakes in a hurry. Higher compression tends to be less forgiving of timing mistakes and the like.
