Some of my thoughts:
1. Hypothetically speaking if you were to cover 110 objects in 8 hours of darkness (one night), you’ll have ~480 minutes; 480/110=4.36. Your 5 min/object estimate is close given you might not get all if few set with the sun. What this means is you really wouldn’t have much time to spare if you were to plan 5min/object. 4min/object “may” give you some time to spare for any slewing/pointing/outage/troubleshooting, etc.
2. 4x1min at ISO1600 sounds about right given the time crunch we are talking.
3. You’ll probably need to squeeze in few darks; may be ~10x1min at ISO1600. You could do them at the end of the session if temp difference will not be large, instead of squeezing them between shots and increasing potential for any mishap/downtime.
4. You would want to start in the west to image the ones close to setting first and work your way eastward.
5. Do your homework ahead of time to arrange objects in such a way so there is least slewing needed from one to the next; again starting from west to east.
6. Also arrange objects in such a way so you do meridian flip only once (western to eastern hemisphere).
7. Your mount’s pointing would have to be nearly perfect; if you are going to a star party then rehearse how quickly you can get your mount setup/pointed early in the evening.
8. You probably will need to re-align (sync) your mount along the way for accuracy; build those re-align stars in your homework with least slewing.
9. Confirm each object at least once (preferably after the first [of four] shot) in the live view to make sure you are on the right object and that it is roughly centered.
10. Plan power accordingly so you wouldn’t have to mess with batteries for any component.
11. “Wheels up”; try not using a laptop; save images locally on the bigger/faster memory chip; only exception would be the external power supply to the camera, if applicable.
12. “Fly by wire”; once mount is pointed, try not using visual cues for anything; live-view should be the guide for centering/framing/aligning, etc.
13. “No touch”; try only sparingly touching your setup once setup; verify images post exposure by setting may be 8 sec review so no manipulation is required.
14. Build focus check points into the plan; lesser the better.
15. Homework/plan is also important for post processing to know what is what once done.
16. Etc... I could go on and on but will stop.
One a side note, mount tools like this...
come in handy in all situations.