hi cinematik,
sorry for a late reply, my week was a bit hectic here.
there're some recommendations for windows users in regards to setting up pen tablets provided here; I can't comment on specific tabletpc/wintab settings, because they're proprietary windows technology and don't exist on mac.
I have a very old, discontinued intuos pro pen tablet (2048 levels of pen pressure + 60º tilt) with a basic plastic nib (I don't like how spring nib feels like because it's very sensitive on low pressure, and it's almost impossible to hit over 80 % true pressure with it)Which pen do you use? It would be interesting if you post AR screenshot with your oil brush strokes with pressure-responsive option on.
I've attached what my strokes look like when I'm painting carefully, trying to get the full pressure range:
and how I paint with oil tool (I tend to lay paint heavily and scumble after):
one thing I've noticed, since I don't use rectangle brush regularly - I prefer the paint roller tool for flat brush stroke application - is that is does behave differently from a round/oval oil brush tool in terms of pressure. oil brush in artrage is developed exponentially (first there was a very basic oil brush as I remember it with artrage app that was bundled with one of my pen tablets; later a square brush option got introduced, and more other tweaks such as rotation and paint depth also became available)
I guess there's some disconnect between what you expect from this brush VS how it actually behaves, but for my purposes, as a way to provide quick and vivid underpainting with a textured oil paint look - it works very well.