The earliest evidence for runes is the Meldorf brooch, dated around 50 AD. So no runes for the Cimbri. Petroglyph production declined sharply after 600 BC and it is really difficult to date a petroglyph. Furthermore, there is not a large quantity of petroglyphs in Denmark. Those were mostly found in Sweden and Norway.  I would avoid petroglyphs for the Cimbri.  It looks a lot like a boat burial, when a person is buried with a boat. Which is not attested for this period. The sinking of the Hjortspring boat is more probably a votive deposit, an offering to deities, from a war booty or a trophy.  Furthermore, you choose a very small boat and you emphasize much more on the stone circle. Which is a bit problematic because the boat is probably the most important part. 

The new release is out! It adds the Gerudo civ, Rupees as a resource, a whole ton of new maps, and spawning features. Check it out here: https://www.moddb.com/mods/hyrule-conquest-revival/downloads/hyrule-conquest-revival-0110

Vidéo+de+Evgueni+Kraї(2).mp4   I think you have enough variation

@Genava55 I know they are predominantly from the viking era, but is there any chance the cimbri had runestones as well? https://en.wikipedia.org/wiki/Runestone

So here's what I'm gonna do: 1. Get rid of the two ahistorical stone babas. I can make them an extra for the Rus in the Millenium mod. I think the remaining 5 stelae are sufficient, but if @Genava55 or someone else got references for more that are different enough from the existing, I might add them. 2. I plan to bake maybe three (?) different diffuse textures for the stelae to get some colour variation. Any wishes? 3. Redo the kurgan: Hill + gravel around it + stelae around the base. Think I'm gonna keep the entrance though. Not sure about the stelae on top, maybe as a variation. I'm gonna make a decal for the foundation actor. 4. Adding player colour. Still not sure how. Maybe that cauldron and the wagon for a ceremony suggested by @Genava55. Not sure where to place them though. Thoughts?