I have Revo stage 2 on my 2000 TT 180. The rear o2 sensor is only "blinded" from exhaust flow, but it must be functional electronically. Aka heated circuit, or else you WILL get a CEL.
I run BKR7E's all day long. I replace them (or try to) every oil change. Some will say this is overkill but, they are cheap plugs, and it isn't hard to do.
I occasionally get a slight misfire under high boost, but my coil packs are original with 126k on the clock. Honestly, I notice the misfire with different weather.
Hope this helps just a bit.