I have only grown Bursa and Ottoman. I topped mine the first year and got good sized leaves almost to where topped. If you are not going for leaf size then be prepared for a lot of small leaves at top of plant.
Ditto what Bob said. I knew someone else with more experience and knowledge could put it into words. I grew some what I was told black sea samsun last year and I let some flower and others were topped. I noticed little difference since they were all mixed after curing.
I think around 20+ plants filled a 2.5 gallon bag after air driying. In my opinion for the aromatic orientals you may want to set up an area to sun cure without the full direct sun. An agribon cover perhaps.
Mine are not topped. I sun cured in bud bags last year so the small leaf size was no problem. Just stack the leaf in the bags and lay them out in the sun. They cure from the outside of the leaf to the inside. I rotate the stack inside out every couple of days. No stringing tiny leaf. Oh, yeah, I let them yellow in the shop before I put them outside. I tried putting green leaf straight to the sun but some of them had some green in them after drying. That may be normal I'm not sure.
If istanbulin doesn't show up pretty soon, send him a PM with your variety. Personally, I really like the mild aromatic flavor of a traditionally grown and cured Oriental in my cigarettes. If you want more nicotine, add Dark Air.
Boboro, first photo looks like an İzmir variety (photo is quite dark). If I were you I'd leave them untopped. But, I couldn't identify the variety in the second photo. What's that ? If it's Shirazi, it's better to top them.