Pictorico Ultra Premium OHP vs. White Film for Silver-Gelatin DN's

I've been playing around with DN's for some years now with marginal results. I have an Epson 3800 with K3 inks, mainly using the Photoshop curves method. Last spring I had some fairly promising results printing digital negatives on Inkpress White Film. Sadly I lost most of my configuration and curves so I'm back to the drawing board. The "paper guy" at B&H told me that OHP is the way to go for DN's. I've gone through about 10 step-tablet iterations or so and I'm at the "tweaking stage" (well within 10% of linear tones) but the prints look like crap! I'm wondering if OHP is no good for SG (all the talk is about platinum/palladium & OHP). Any insights would be helpful.

I'm linearizing my tones using a densitometer.

the prints look like crap!

You need to be more specific.

Like I said, the tablet tonal scale is mostly linear (within 10%) but the tones in the image appear blotchy and uneven (see attached).

Given the relatively scarcity of [concise and usable] information out there on digital negatives, I'm not holding out much hope for troubleshoot this issue. I'm gonna go back to known quantities, and re-do the curve for Pictorico White Film. I remember seeing curves for this medium on Dan Burkholder's site for use with silver gelatin.

It would be helpful to see the positive digital image so we can better evaluate the negative, but this doesn't look like a curve problem -- more like a reflection or uneven lighting across the negative. The negative is out of focus at the hairline above the right eye, so I suspect the negative popped and that is part of the problem.
What exactly is the Photoshop curves method? I don't know of any method that doesn't need a correction curve, and these are often made using Photoshop. Are you making colorized negatives using the Epson driver? Black & white negatives using Epson ABW? Are you using matte black (MK) or photo black (PK)?