You should check your slight sarcasm detection unit i Think it's broken
The bottom ends on those benz engines are really really beefy, i wouldn't be worried about anything down there. My friend with the giant holset on his has no issues with the engine, instead he's split a few transmission cases.
Also a stuck shut waste gate shouldn't cause it to blow tons of oil anywhere, the turbo isn't blown, you're just going to be over spinning it (but that T3 they put on there is probably fine for it, but yes in the long run that would probably be bad for the turbo) but it'd also be more fun
Plus, you'll probably run out of fuel to make the turbo spin higher (and since it's a diesel you don't have to worry about lean conditions).