Long distance Mesh

Hello Everyone.
I am trying to create a 30-35km Mesh between multiple nodes, but for now im experimenting with only 2.
I have no problem with a connection of 16 km, but my next jump is 33km as the areas around me is rocky and free line of sight is limited.
I recieve a connection, but it times out and reconnect constantly. (Connects, counts to 2-3 seconds and starts over)

I’m using 5.8GHz ac link with 802.11 protocol.
Software: 6.40.3(stable)
I have noticed that NV2 seems to be favorable on long distance, but it does not work on Mesh?

There should be enough on a 36dBm EIRP with a 15dBi antenna on such a link. But also tried to boost the Radio to go above 36dBm to make sure this is not the issue, and the problem persists.
using: RB922UAGS-5HPacD on both sides.

Could anyone give me a pointer on what might be wrong?

Also, how can i lock on modulation?
I’ve tried to set both cards on ht-basic-msc=msc-0 ht-supported-msc=msc-0, and the bandwidth tester goes way beyond when i test in the office.

Any help is appriciated.