Too bad. One would think somebody at Epson would have thought to add tonality-selective ink limit control. But then again, what do I know about these things.
Check whether the workflow you use gives a better Dmax at say 95% ink amount by printing a 21 or 51 step greyscale target, QTR has some. If so then try some other matte media presets in the Epson driver that may have a more suitable black ink lay-down to get near that optimal black ink amount for Dmax on that paper. The other inks may suffer by that though so for example gamut could shrink but that may be controllable with the ink lay down setting possible in the driver. The last is more a gamma like change in almost all drivers including HP models.
If you need it for B&W then go the QTR route and use its driver + partioning, calibration and profiling tools. You can customise that workflow to an optimal state for your inks and papers. If it is for color then only a full RIP will allow a similar approach and you can optimize the black Dmax, the maximum chrome per color ink channel and the UCR or similar black generation control. A steep learning curve with more costs involved than just the RIP purchase and there may not be a universal RIP that supports the 3800. Imageprint is somewhat different on that last aspect but is printer specific and you have to count whether that is a good decision for the time the 3800 will last.
Met vriendelijke groet, Ernsthttp://www.pigment-print.com/spectralplots/spectrumviz_1.htm
December 2012, 500+ inkjet media white spectral plots.