Index: ps/trunk/binaries/data/mods/public/simulation/ai/petra/attackPlan.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/ai/petra/attackPlan.js
+++ ps/trunk/binaries/data/mods/public/simulation/ai/petra/attackPlan.js
@@ -806,7 +806,10 @@
 		if (sameLand && gameState.ai.accessibility.getAccessValue(ent.position()) !== land)
 			continue;
 		let dist = API3.SquareVectorDistance(ent.position(), position);
-		// in normal attacks, disfavor fields
+		// Do not bother with decaying structure if they are not dangerous
+		if (ent.decaying() && !ent.getDefaultArrow() && (!ent.isGarrisonHolder() || !ent.garrisoned().length))
+			continue;
+		// In normal attacks, disfavor fields
 		if (this.type !== "Rush" && this.type !== "Raid" && ent.hasClass("Field"))
 			dist += 100000;
 		if (dist < minDist)