Terrain plays always a very important role in Necromunda. I also think that a 3D playing field should have at least two or three levels and what appeals to cronewald are similar considerations I make to terrain construction.
Among other things, I still want a modular big wall with a gate too. The gate is the natural weak point of every wall. You could even reinforce this by providing cover for an attacker at the gate. Conversely, the wall crone would be a very strong position that could be even reinforced with ramparts and battlements.
On the other hand, you could then set up a tower for a sniper, from which he can see and bombard the top of the wall. Or you can already plan some weak points and alternative paths during construction.
I have planned a concealed side door or halfway up a man-high drain pipe on one side and on the other side the wall should be partially buried. A narrow smuggling path leads over the rubble mountain to near the top of the Wall. In addition, I had planned a mine that a gang would use to search for Archeotek and break through the wall or discover an unknown hidden door. But that is still open.
With the main gate, pipe or side door, smuggling path and the mine, there would be four different ways to get through the wall. Other options are ladders and grappling hook launchers. Some fighters can also fly high or ignore terrain. And once you are up or through the wall, there are stairs and elevator on the other side. You could also add gimmicks like traps, drawbridge, portcullis, hidden explosive charge from former assaults, or an automatic defense system that can be hacked. All in all, a lot of possibilities and that offers variety and makes it more interesting.
To revisit the height, the top platform of the tower from Gang Stronghold is at about 22.5 cm. At this time the tower is my highest terrain piece and therefore my point of reference for the rest of the terrain. And he is slightly taller than three Zone Mortalis Walls, which are with platform about 19 cm high. Sector Mechanicus platform is about 12.8 cm. At this height, I can also comfortably reach in with my hands.
P.S.: All dimensions are approximate dimensions without guarantee.