1/0 works once again, maybe.

src/main/java/net/runelite/deob/Deob.java

@@ -92,9 +92,9 @@ public class Deob
 		{	
 			new MultiplicationDeobfuscator().run(group);
 
-			//new MultiplyOneDeobfuscator().run(group);
+			new MultiplyOneDeobfuscator().run(group);
 
-			//new MultiplyZeroDeobfuscator().run(group);
+			new MultiplyZeroDeobfuscator().run(group);
 			
 			if (last == cur)
 			{

src/main/java/net/runelite/deob/deobfuscators/arithmetic/MultiplyOneDeobfuscator.java

@@ -1,6 +1,9 @@
 package net.runelite.deob.deobfuscators.arithmetic;
 
+import java.util.Collection;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 import net.runelite.deob.ClassGroup;
 import net.runelite.deob.Deobfuscator;
 import net.runelite.deob.attributes.code.Instruction;
@@ -35,6 +38,9 @@ public class MultiplyOneDeobfuscator implements Deobfuscator
 					continue;
 				
 				Instructions ins = ictx.getInstruction().getInstructions();
+				if (ins == null)
+					continue;
+				
 				List<Instruction> ilist = ins.getInstructions();
 
 				if (!ilist.contains(ictx.getInstruction()))
@@ -58,6 +64,9 @@ public class MultiplyOneDeobfuscator implements Deobfuscator
 				if (removeIdx == -1)
 					continue;
 				
+				if (!MultiplicationDeobfuscator.isOnlyPath(e, ictx))
+					continue;
+				
 				ictx.removeStack(removeIdx);
 				ins.replace(ictx.getInstruction(), new NOP(ins));
 				//ins.remove(ictx.getInstruction());

src/main/java/net/runelite/deob/deobfuscators/arithmetic/MultiplyZeroDeobfuscator.java

@@ -31,6 +31,8 @@ public class MultiplyZeroDeobfuscator implements Deobfuscator
 			{
 				Instruction instruction = ictx.getInstruction();
 				Instructions ins = instruction.getInstructions();
+				if (ins == null)
+					continue;
 				
 				if (!(instruction instanceof IMul))
 					continue;
@@ -69,6 +71,9 @@ public class MultiplyZeroDeobfuscator implements Deobfuscator
 				if (!ilist.contains(instruction))
 					continue; // already done
 				
+				if (!MultiplicationDeobfuscator.isOnlyPath(e, ictx))
+					continue;
+				
 				// remove both, remove imul, push 0
 				
 				ictx.removeStack(1);