diff --git a/data/totalannihilation-rules.json b/data/totalannihilation-rules.json
index 60f264f..b62c9a9 100644
--- a/data/totalannihilation-rules.json
+++ b/data/totalannihilation-rules.json
@@ -20,7 +20,15 @@
     "aircraft is an ordinary ground target that anything can shoot, and it cannot fire back.",
     "`domain` and the unit's `moveClass` have to agree: an air unit takes a move class flagged",
     "`\"air\": true`. Terrain passability comes from the move class COST TABLE, not from the terrain's",
-    "own `blocksMove` \u2014 that is how `hover` crosses water without a per-terrain exception."
+    "own `blocksMove` \u2014 that is how `hover` crosses water without a per-terrain exception.",
+    "",
+    "Armor classes are the whole balance surface: every weapon lists a multiplier for EVERY class,",
+    "so a roster change is a table edit rather than a code change. Two of them exist purely so a",
+    "counter can be expressed at all \u2014 `air` (aircraft, separate from light/medium so a weapon can",
+    "be lethal to planes without also being lethal to jeeps and tanks) and `fortification` (Laser",
+    "Tower and Missile Launcher, separate from `structure` so a weapon can specialise in cracking",
+    "defences without flattening generators). Adding a class means adding a key to all 12 weapons;",
+    "compileRules refuses to start if one is missing, which is the point."
   ],
   "version": 1,
   "constants": {
@@ -80,7 +88,9 @@
     "light",
     "medium",
     "heavy",
-    "structure"
+    "structure",
+    "fortification",
+    "air"
   ],
   "moveClasses": {
     "foot": {
@@ -264,11 +274,13 @@
         "ground"
       ],
       "armorMul": {
-        "infantry": 1.3,
-        "light": 0.85,
-        "medium": 0.3,
-        "heavy": 0.12,
-        "structure": 0.2
+        "infantry": 1.0,
+        "light": 0.5,
+        "medium": 0.25,
+        "heavy": 0.15,
+        "structure": 0.7,
+        "fortification": 0.55,
+        "air": 0.3
       },
       "fx": {
         "style": "tracer",
@@ -292,11 +304,13 @@
         "ground"
       ],
       "armorMul": {
-        "infantry": 1.3,
-        "light": 0.85,
+        "infantry": 2.2,
+        "light": 0.7,
         "medium": 0.3,
-        "heavy": 0.12,
-        "structure": 0.2
+        "heavy": 0.15,
+        "structure": 0.5,
+        "fortification": 0.4,
+        "air": 0.35
       },
       "fx": {
         "style": "tracer",
@@ -310,20 +324,22 @@
       "id": "sniperrifle",
       "name": "Marksman Rifle",
       "kind": "hitscan",
-      "damage": 55,
-      "reload": 2.0,
+      "damage": 70,
+      "reload": 2.2,
       "burst": 1,
-      "range": 460,
+      "range": 580,
       "spread": 0.0,
       "targets": [
         "ground"
       ],
       "armorMul": {
-        "infantry": 2.2,
-        "light": 0.9,
-        "medium": 0.3,
-        "heavy": 0.1,
-        "structure": 0.1
+        "infantry": 3.2,
+        "light": 0.35,
+        "medium": 0.12,
+        "heavy": 0.08,
+        "structure": 0.08,
+        "fortification": 0.08,
+        "air": 0.15
       },
       "fx": {
         "style": "beam",
@@ -354,7 +370,9 @@
         "light": 1.15,
         "medium": 1.0,
         "heavy": 0.8,
-        "structure": 1.2
+        "structure": 1.2,
+        "fortification": 1.1,
+        "air": 1.0
       },
       "fx": {
         "style": "shell",
@@ -368,7 +386,7 @@
       "id": "rocketpod",
       "name": "Rocket Pod",
       "kind": "guided",
-      "damage": 40,
+      "damage": 48,
       "reload": 4.0,
       "burst": 2,
       "burstDelay": 0.25,
@@ -387,7 +405,9 @@
         "light": 0.6,
         "medium": 1.0,
         "heavy": 1.4,
-        "structure": 1.5
+        "structure": 1.5,
+        "fortification": 1.6,
+        "air": 2.6
       },
       "fx": {
         "style": "rocket",
@@ -402,10 +422,10 @@
       "id": "shoulderrocket",
       "name": "Shoulder Rocket",
       "kind": "guided",
-      "damage": 32,
+      "damage": 40,
       "reload": 2.2,
       "burst": 1,
-      "range": 320,
+      "range": 380,
       "minRange": 60,
       "speed": 260,
       "turnRate": 2.0,
@@ -416,11 +436,13 @@
         "air"
       ],
       "armorMul": {
-        "infantry": 0.35,
-        "light": 0.8,
-        "medium": 1.1,
-        "heavy": 1.3,
-        "structure": 1.0
+        "infantry": 0.3,
+        "light": 0.9,
+        "medium": 1.3,
+        "heavy": 1.2,
+        "structure": 1.2,
+        "fortification": 1.9,
+        "air": 2.8
       },
       "fx": {
         "style": "rocket",
@@ -448,7 +470,9 @@
         "light": 1.0,
         "medium": 0.8,
         "heavy": 0.6,
-        "structure": 0.5
+        "structure": 0.5,
+        "fortification": 0.45,
+        "air": 0.8
       },
       "fx": {
         "style": "beam",
@@ -476,7 +500,9 @@
         "light": 1,
         "medium": 1,
         "heavy": 1,
-        "structure": 1
+        "structure": 1,
+        "fortification": 1,
+        "air": 1
       },
       "fx": {
         "style": "dgun",
@@ -503,7 +529,9 @@
         "light": 1.2,
         "medium": 0.9,
         "heavy": 0.55,
-        "structure": 0.4
+        "structure": 0.4,
+        "fortification": 0.35,
+        "air": 1.0
       },
       "fx": {
         "style": "beam",
@@ -535,7 +563,9 @@
         "light": 0.7,
         "medium": 1.1,
         "heavy": 1.5,
-        "structure": 1.3
+        "structure": 1.3,
+        "fortification": 1.2,
+        "air": 2.8
       },
       "fx": {
         "style": "rocket",
@@ -561,7 +591,9 @@
         "light": 1.0,
         "medium": 0.85,
         "heavy": 0.6,
-        "structure": 0.2
+        "structure": 0.2,
+        "fortification": 0.2,
+        "air": 1.0
       },
       "fx": {
         "style": "tracer",
@@ -591,7 +623,9 @@
         "light": 1.0,
         "medium": 1.0,
         "heavy": 0.85,
-        "structure": 1.6
+        "structure": 1.6,
+        "fortification": 1.5,
+        "air": 1.0
       },
       "fx": {
         "style": "shell",
@@ -696,7 +730,7 @@
       "role": "combat",
       "size": "small",
       "radius": 16,
-      "hp": 200,
+      "hp": 130,
       "speed": 46,
       "turnRate": 5.0,
       "moveClass": "foot",
@@ -726,7 +760,7 @@
       "role": "combat",
       "size": "small",
       "radius": 16,
-      "hp": 240,
+      "hp": 150,
       "speed": 50,
       "turnRate": 5.5,
       "moveClass": "foot",
@@ -818,7 +852,7 @@
       "role": "artillery",
       "size": "medium",
       "radius": 28,
-      "hp": 1250,
+      "hp": 1050,
       "speed": 75,
       "turnRate": 1.8,
       "moveClass": "tread",
@@ -893,7 +927,7 @@
       "speed": 290,
       "turnRate": 3.0,
       "moveClass": "air",
-      "armorClass": "light",
+      "armorClass": "air",
       "sight": 620,
       "cost": {
         "energy": 900,
@@ -932,7 +966,7 @@
       "speed": 215,
       "turnRate": 1.7,
       "moveClass": "air",
-      "armorClass": "medium",
+      "armorClass": "air",
       "sight": 560,
       "cost": {
         "energy": 1700,
@@ -1140,7 +1174,7 @@
         "h": 1
       },
       "hp": 1700,
-      "armorClass": "structure",
+      "armorClass": "fortification",
       "sight": 300,
       "cost": {
         "energy": 420,
@@ -1171,7 +1205,7 @@
         "h": 2
       },
       "hp": 3100,
-      "armorClass": "structure",
+      "armorClass": "fortification",
       "sight": 420,
       "cost": {
         "energy": 1100,