Possible workaround: While you have no walls, Have no Gate. When Raiders attack, set a gate (no need to really build it) and ring the alarm. Your Villagers will gather around your "new gate".

A "Gather Here" Point would be really great. Ring the Alarm (Villagers grab Weapons and try to defend every possible spot) Set the Gather Point (Poeple will only be in the determined area and defend).

This whole thing was already part of this discussion: https://steamhost.cn/steamcommunity_com/app/858810/discussions/0/1675812484356488492/

I really hope the "Gather Here" Feature will soon be realised, after the long-awaited funeral mechanism.

At the bottom of the linked discussion is another picture. Topic "Key Point Defense". Still a very useful tactic.

Another Version of "Key Point Defense": https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1923008163

My "Key Point Defense" for Soloplay: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1916422694

Yea What I usually do is build four gates on the four sides then when raiders come I click on the gate they're coming from and select the alarm at the bottom of the screen, they then run to that gate.
Schwitty.k I have the Highlander mod but didn't even try the solo menhir, how did you manage it, does it have to be done start to finish by him alone or just built?

Hey :-)

Yes, 4 gates are a good thing.

I abandoned my "Tube Design" after the towers got nerfed and the new defense plattforms came: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1735008421

but maybe i should try a tube again, this time a little different. My last one became a giant walkpath with starving people :D https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1826964303

For Solo Menhir i used this Location: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1916425177

Good Luck! Try to micromanage and play DoM like a Survival Game (eat, sleep, pray, craft, keep an eye on the stats)
You achieve the milestone when you build a Menhir and your Population is 1 :-)