I have read all of Eric Chan's excellent notes and there are a few areas where the updates have not filtered through, so to speak. I know with MAC and LR4 I can't experiment with his ABW profiles, the best balance I have so far is to adjust contrast and brightness in the LR printer module and add 5% shadow tonality. I am keen to get the majority of the image looking right as I endeavour to recover shadow detail, if I also add a little 5-10 in the develop module, that's as far as I can go before it looks wrong.
It's relatively cheap paper, but it does have nice deep blacks. Fortunately HFA museum etching is better regarding shadow detail.