diff --git a/build.gradle b/build.gradle
index 00d41003c..3ba6bef64 100644
--- a/build.gradle
+++ b/build.gradle
@@ -333,11 +333,16 @@ Provider<IrisModdedBuildService> matrixWorkers = gradle.sharedServices.registerI
     maxParallelUsages.set(matrixParallelism)
 }
 List<String> nestedBuildArguments = [gradle.startParameter.buildCacheEnabled ? '--build-cache' : '--no-build-cache']
-if (providers.gradleProperty('multiplexorSandbox').getOrElse('false').toBoolean()) {
+boolean multiplexorSandbox = providers.gradleProperty('multiplexorSandbox').getOrElse('false').toBoolean()
+int nestedWorkers = multiplexorSandbox
+    ? Math.max(1, gradle.startParameter.maxWorkerCount.intdiv(matrixParallelism))
+    : Math.min(2, gradle.startParameter.maxWorkerCount)
+int nestedProcessors = multiplexorSandbox ? nestedWorkers : 2
+if (multiplexorSandbox) {
     nestedBuildArguments.addAll(['--no-daemon', '-PmultiplexorSandbox=true'])
 }
 String nestedJvmArguments = providers.gradleProperty('org.gradle.jvmargs').getOrElse('') +
-    ' -XX:ActiveProcessorCount=2'
+    " -XX:ActiveProcessorCount=${nestedProcessors}"
 if (gradle.startParameter.rerunTasks) {
     nestedBuildArguments.add('--rerun-tasks')
 }
@@ -373,7 +378,7 @@ irisModTargets.each { String targetMinecraft, Map<String, Object> target ->
             javaRuntime.set((int) target.java)
             List<String> command = [rootProject.file(moddedWrapperScript).absolutePath, 'assemble', 'compileTestJava',
                     'verifyLoggingPolicy', 'verifyNativeClassBoundary', '--console=plain',
-                    "--max-workers=${Math.min(2, gradle.startParameter.maxWorkerCount)}",
+                    "--max-workers=${nestedWorkers}",
                     "-Dorg.gradle.jvmargs=${nestedJvmArguments.trim()}",
                     "-Dorg.gradle.daemon.registry.base=${rootProject.file(".gradle/iris-daemons/slot-${daemonSlot}").absolutePath}",
                     '-Dorg.gradle.daemon.idletimeout=3600000',
diff --git a/gradle/multiplexor.gradle b/gradle/multiplexor.gradle
index f3b2ac5d0..a43e29fca 100644
--- a/gradle/multiplexor.gradle
+++ b/gradle/multiplexor.gradle
@@ -56,14 +56,15 @@ gradle.projectsEvaluated {
                 : target[loaderPins[loader]].toString()
             String displayedPin = pin.startsWith(minecraft + '-') ? pin.substring(minecraft.length() + 1) : pin
             String artifactName = "Iris v${project.version} [${label}] ${minecraft}+${displayedPin}.jar"
+            boolean forge = loader == 'forge'
             buildTargets.add([
                 id: "${loader}-${minecraft}".toString(),
                 tasks: [":verify${label}${minecraft.replace('.', '_')}".toString()],
-                arguments: ['-PmoddedBuildParallelism=1', '-PmoddedTestForks=1',
+                arguments: ['-PmoddedBuildParallelism=1', "-PmoddedTestForks=${forge ? 2 : 1}".toString(),
                     '-PmultiplexorSandbox=true'],
                 java: 25,
-                memoryMiB: 8192,
-                workers: 2,
+                memoryMiB: forge ? 16384 : 8192,
+                workers: forge ? 8 : 2,
                 dependsOn: [],
                 artifacts: [[path: "adapters/${loader}/build/${minecraft}/libs/${artifactName}".toString(),
                     role: 'runtime', platforms: [loader], minecraftVersions: [minecraft]]]