I want wireless ptmp link with 4 km radius
I use the OmniTIKU-5HnD or GrooveA5Hn?
our client : SXT and Nano Station 5

Omnitik has ~8dBi antenna, but with the groove you can choose your own antenna, potentially with much larger gain (budget is the only limitation)

OmniTIKU-5HnD works well for 5 km radius?
and throughput ?

with SXT as client? yes, should work fine.

and nano station m5?

Probably also no problem. But with Nanostation you will not be able to utilize the full potential of TDMA Nv2 technology, as it works only when all devices are made by mikrotik. This would give you additional speed and distance.

if use the OmniTIKU-5HnD and SXT
average bandwidth ?

too hard to say, depends on line of sight, position of mounting, noise in the area, chosen frequency, etc.

to normis.

Has anyone tested this?

If I use one omnitik to about 10 SXT clients, would they all get 10/10 mbit connection at the same time if the omnitik is feeded whit 100/100. If the distance is no longer then 2-4 km.