All I did was select all the polygons (Edit Poly) and first clear all the smoothing groups.
Then, with everything still selected, just set everything to the same smoothing group (1 in my case).
For the displacement settings, set the size (view) to 0,5 pixels and slowly up the iterations while test rendering to get the desired sharpness.
For the MightyTiles side of things I ran it through a Color Correction node set to "Monochrome" to make sure I've got grayscale values.
Then I added a micro noise map to it using a mix map set to 10% mix to give it just a little roughness.