Maybe someone else will chime in... but if you have done all the things you have said... then I would start with a compression test, that will let you know if the rings, valves, etc are causing the problem...
Otherwise you could have a DOA turbo but if it was doing before the original set were replaced, and again after, that leads me to believe it's mostly likely not a turbo...
Could try a catch can, but that would most likely hide an existing issue..
So is the smoking only on decel and when reving past 2K in Park? Cause your last post made it sound like it's also smoking when it down shifts going into wot?
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