diff --git a/deploy/Caddyfile b/deploy/Caddyfile
index 02ed1ce..c2d0c8b 100644
--- a/deploy/Caddyfile
+++ b/deploy/Caddyfile
@@ -4,6 +4,8 @@
 
 {
 	admin off
+	# The ACME account: expiry notices, and ZeroSSL (the fallback issuer) requires one.
+	email admin@saty.dev
 }
 
 saty.dev {
diff --git a/src/server/regions.js b/src/server/regions.js
index ad6e86f..0e25f4d 100644
--- a/src/server/regions.js
+++ b/src/server/regions.js
@@ -69,7 +69,10 @@ export class Regions {
       if (free && !g.free) continue;
       out.push(g);
     }
-    out.sort((a, b) => Number(b.free) - Number(a.free) || a.claimedBy.length - b.claimedBy.length || b.open - a.open || a.key.localeCompare(b.key));
+    // A good region is one agent's batch: 5 to 80 open functions first, then bigger ones (share
+    // them, or take them in parts), then the tiny ones.
+    const size = (g) => (g.open >= 5 && g.open <= 80 ? 0 : g.open > 80 ? 1 : 2);
+    out.sort((a, b) => Number(b.free) - Number(a.free) || a.claimedBy.length - b.claimedBy.length || size(a) - size(b) || b.open - a.open || a.key.localeCompare(b.key));
     return { total: out.length, regions: out.slice(0, Math.min(Math.max(1, limit | 0), 1000)) };
   }