Replace the rotor. They have caused me and many mechanics to misdiagnose and throw parts at the problem.

They have a 2K internal resistor hidden by epoxy that breaks down under load.

Do cylinders 3 and 5 give better values with some oil?

So, did you ever check out the coolant temp sensor? I don't see that as causing the car to die while running, but I had one give me fits on my '97 T5. (EDIT - thinking back, it did stumble and die on me once, before I fixed it) Car was hard to start, would run rough, etc. It eventually backfired/pop...

Also read about reluctor rings, BCM (ABS unit controller failure), clockspring sensor, yaw sensor, DEM module (not all necessarily related but worth a check while there)
Yours being a 2004 I would also inspect the CEM for any water leaks (not related but good a check)