To answer your question, waffle darts will not work well in a sealed brass breach without lubrication. (They will just make a squeaky noise and barely come out of the barrel) with lubrication, (I use plastic safe wd40, but any air tool lube or plunger tube lube will work) they will have lazerbeam accuracy.
I only have access to stock elite darts currently which is why Im looking into a scar barrel. I know waffle tips and accufakes are the best full-length but I havent bought any yet because Im not sure if they work well in sealed brass breaches